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Why does my betta fish have a bump on his head

Betta infected with hole in the head have an abrasion on the head that looks like a pinhole or white fuzz. The parasitic infection can be prevented by cleaning water off carbon. Parasite Clear is an antibiotic that can cure the disease. The infected fish usually dies after a few days if it is not treated early enough Hi, I have a really important question. Recently, this past week, my fish has been growing a white lump/bump on his face. He's a blue male betta fish. I've had him for almost a year and a half Andy this is the first time he's had a problem. Hes also been hiding in his cave for 2 days now. Should I be concerned? It could be an infection Lumps on betta's head One very common place to find lumps is on your betta's head. Although head tumors can occur in bettas, lumps in this location can also be caused by a bacterial infection. Columnaris is one common bacterial infection that causes lump-like lesions to form around the fish's gills and mouth

As well as being on their head, you may notice a lump on your betta's side. Once again, while this could be a tumor, it may not be. In fact, when it comes to your betta fish's side, there can be quite a few different causes of a lump coming out. Some of them are a lot more common than tumors, and also a lot more treatable BullRider on Fishlore Usually caused by improper nutrition or habitat cleanliness, early signs of hole in the head disease include small sores, dents, or pin-holes on the surface of the betta's head and above its eyes. Over time these holes become increasingly larger lesions Head twitching can be the sign of a few different things. High levels of chlorine, ammonia or a poor pH can be a factor. What is the pH of the water that you are using? If you do not see physical white bumps on your betta that look like little grains of salt it is possible that your betta does not have ick

Lumps that form on a fish's head are quite common. Although Bettas can develop tumors on their head, bacterial infections can also cause lumps to develop on their heads. One of the most common bacterial infections is columnaris. This infection will cause tumor-like lesions to develop around the Betta's mouth and gills Why does my betta fish keep putting his head in the rocks? I always think that it has died but I'm always wrong. - Answered by a verified Pet Specialist. We use cookies to give you the best possible experience on our website However, my fish (which I believe it is a cichlid) is not doing well. In what seems to be a day he has grown a white bump on his head (tumor-like) and has begun to turn in a dying, belly up fashion. In the 50 gal tank with him are 2 neons and 2 platys. Now, one neon has begun to swim a little differently. He seems to reaching for the stars, or. The bump is only on one side. I have attached a pic of the aquarium. He is the only thing in the 10 Gallon Aquarium. I have a heater and filter. The temp is kept between 77-82. We perform 75% water changes on about a month basis. I feed him food pellets and he has been eating normally Fish Fungus shows white bumps or lumps on the skins of the betta fish. Untreated fungal infection can also lead to other severe and fatal diseases, making it harder to cure. Fungal infections are also superficial, which means they only show on the surface and won't hurt your betta fishes' internal organs

15 Common Betta Fish Diseases (With Pictures): Prevention

  1. Most of these growths are benign cutaneous tumors within the layers of the fish's skin. (Technically nerve sheath tumors aka neurofibromas or shwannomas.) It is very common to have goldfish with a few lumps, bumps, nodules or growths; whatever you want to call it. Are bumps on goldfish life threatening
  2. Hi, peas are not good for Bettas try daphnia instead and they only need to be fed once a day, so no food for a few days and then daphnia. #20. Josa. 5 years ago. Wait, how much is too much, because I feed my beta two pellets three times a day, and he recently got a bump under his head. #21. Helped
  3. Betta Fin Rot Causes First things first, don't panic because fin rot is very common and not usually deadly. It is the most common ailment amongst the species and is caused by bacteria that naturally exist in your aquarium's water
  4. Jul 23, 2003. For the past two days, my Betta has been very lethargic. He floats in his tank with his body vertical, mouth sticking above the water and opening and closing repeatedly. He will not eat his food. When he does swim, he swims only right below the surface of the water, with his head partially above the water, like a snake would do.

If the white formations on your fish appear like larger patches, that have a fuzzy texture, or the dots are too dense to count then you may be looking at a fungus outbreak or a bacterial infection. The latter include deadly infections such as Columnaris. In some cases even viruses such as Lymphocystis will cause such symptoms The most common cause of bloat in bettas is constipation, followed by swim bladder disease, and unfortunately after that dropsy. If your betta has the first two, then he can often make a speedy recovery. But if he's suffering from dropsy then the chances of survival are a lot slimmer Betta fish can live a happy and healthy life for about 4 to 5 years with good care. Some may live even longer, but after hitting the 5-year mark they will become lethargic and more susceptible to disease. Older Betta fish won't have that youngster energy to explore. They will prefer laying around on leaves or the bottom of your fish tank These fish have various tumors and lumps. Go to the fish tuberculosis photos page to see photos of fish with those types of tumors

Why does the tail or fins of my betta fish look torn, short, or ragged? A chewed-up, tattered-looking tail and/or fins is mostly likely caused by fin rot or by a tank mate's nibbling. If your betta starts looking a little worse for wear, you should determine and treat the cause as soon as possible I have a almost 5 year old betta in a 6.1 gallon tank on my desk and my sister pointed out a lump on his side to me yesterday. I had not noticed it since he was (and still is) acting fine. He eats and swims and fights with his nerite snail.I feed him pelleted betta food once a day and I know that's probably to much for a betta but he has been doing fine on that feeding style for three years so. Here are some of the most common reasons why a Betta fish is laying at the bottom of the tank. 1. The Betta is Getting Older. Bettas have a relatively short lifespan. In good conditions, these fish will live between three and five years! If you've had your Betta for a while, they could be suffering from the effects of old age Inspect your Betta fish's eyes to see if one eye or both eyes are protruding from his head. This is a symptom of a bacterial infection called popeye. Your fish may have developed popeye due to dirty tank water, or due to a more serious illness like tuberculosis. Sadly, tuberculosis is not curable in fish and is fatal for Betta fish Your Betta Fish Is Pregnant. Another reason why your Betta fish might have a very large belly is that it is a female and she is full of eggs. The first thing you will want to do is to confirm that you indeed have a female Betta fish. The buildup of eggs happens in most female Betta fish when they are preparing to lay eggs and mate with a male

My Betta fish has a bump on his head

Article Summary X. To tell if a betta fish is sick, look for signs that it's unhealthy, like faded coloring, torn fins, bulging eyes, white spots, and raised scales. You should also watch out for a decrease in appetite or a low activity level, which are also signs that a betta fish is sick Ich or Ick is one of the most common betta fish diseases, although it is preventable and treatable. It is caused by an external water based parasite that causes malaise, itchiness, and irritation after latching onto the body of a betta fish Lymphocystis may be another reason for your betta fish turning white. Perhaps the worst thing about this viral disease is that it currently has no cure. The fish may show symptoms by growing small pink or white lumps on their fins or skin in the early stages. This often makes people confuse it for Ich

Betta Fish Tumor: Causes, Cures, and More - Betta Sourc

A tumor on Betta fish can vary in size and location on the fish (including on the tail, on side scales, a tumor on head scales (interorbital region), or internal (such as a brain tumor). Smaller growths may not affect your pet much, but a larger tumor can make it difficult for your Betta fish to swim through the water I've had my betta for almost a year now. He's in a 3.5 gallon unfiltered tank with live plants. I do a 25% water change every week. Ammonia/nitrate levels within range. In February I noticed one of the scales on his head was bent up but I don't know how this happened Jul 23, 2003. For the past two days, my Betta has been very lethargic. He floats in his tank with his body vertical, mouth sticking above the water and opening and closing repeatedly. He will not eat his food. When he does swim, he swims only right below the surface of the water, with his head partially above the water, like a snake would do. Betta fish are prone to this disease because they have those long, fancy tails. Female bettas and varieties with shorter fins, like the plakat , rarely develop fin or tail rot. It's the price fancy male bettas pay for having such flashy and elaborate fins 1. Betta Fish Don't Need a Lot of Space. Perhaps the most popular myth is that bettas can live in small bowls. The opposite is true: Betta fish need a tank that's at least 5 gallons (19 liters), and 10 gallons (38 liters) is better.The origin behind this persistent myth is uncertain, but may come from the fact that bettas are often sold in small containers, and because they have some ability.

Fish struggles to swim, may float with head tipped down, or have difficulty surfacing, no balance, etc. May occur after eating. Swim Bladder Disease: Stop feeding for 3-4 days. If symptoms persist, feed the affected fish a small amount of fresh spinach or a green pea without the skin (laxatives) Dec 8, 2011. #1. I have just noticed this a couple of days ago, and today he seems to be really lazy, laying flat on his side, on the ground. I thought he had died, but when i go near the tank he swims around like normal. The lump is on one side and in his abdomen area, it isn't abstracting his swimming, nor are any of my fish showings similar. The other day I went over to my brother's house, and we were watching his Betta Fish. he told me that his Betta has been swimming near the surface of the water a lot lately, and he didn't know why. and when he googled it there wasn't a whole lot of information about it. so by writing this article I hope to provide you with the information you are looking for For your Betta, the chances of surviving dropsy are slim, although there are a few rare cases where fish have recovered from dropsy. However, euthanasia is usually the most humane option when dealing with dropsy. Symptoms Of Dropsy. If your Betta fish is suffering from bloat and you suspect dropsy, be on the lookout for these other symptoms The fish will swim around the tank fast, which isn't healthy for them. On the other hand, the colder temperature in the aquarium will cause the Betta fish to become sluggish, sleepy, and have a loss of appetite. When the water is too cold, their metabolism will slow down and there will be less movement from the fish

I have since added some baby shubunkin 4 weeks ago and all fish are doing very well, lively, eating and easy to count them all. I am only looking to have goldfish and shubunkins. One of the original goldfish has a lump on his head. Its been there since I first got him but this lump has got bigger over the last week or so. I have attached some pics Probably, it is genetic. A betta is sort of like a bully, out in the open, it is scared. It hides in a corner, inside caves, between plants, lurking here and there. It is happiest in a little aquarium all by itself, and maybe with a smaller fish t.. If your favorite betta fish isn't swimming the way he should, there is a chance he is suffering from swim bladder disease. Swim bladder disease is a common problem in bettas but is easily treated. The swim bladder is a gas-filled sac inside your fish. It helps the fish rise and lower in the water much like a buoyancy control device a diver might use

I have a nano cube. I actually tore it down yesterday. Removed all gravel, all decorations, all water, opened my pump. Nothing! Nada! As if i did not own a half moon betta fish (his name was Ti, btw ) I have another crown tail betta, which I moved him from his 5 gallon aquarium to the nano cube yesterday, but i'm still baffled I have a male betta and he has got so he stay at the bottom of the fish tank it a 2.5 gal tank so I have taken him out of the tank and put him in treated fresh water about 1/2 gal with filter i feed him pellets and blood worms as a treat but I have notice he looks like he dying his middle looks dark with a very small dark place on his side i. Betta Fish are known to be hard and easy to care for fish. However, that does not mean that diseases cannot affect them. If you found your Betta Fish turning white, then there is a high chance of fungal infections. All aquarium fish are more susceptible to fungal infections and the Betta Fish species is not an exception My betta fish has lumps on both sides of the end of his tail. The lumps are black and grey in color. He eats fine but I think the lump is affecting his swimming. I tried fluke tabs in the aquarium, but no improvement

I have a Betta Fish that has a large white lump near his tail I'm not sure if it is swim bladder, tumor, or a fungus It is likely not his swim bladder since that is an internal organ. Fungal infections appears as fuzzy growths on fins and scales My betta fish always swims at the bottom of the tank. I've had him for about a year now and he always does this, but i'm not sure why. I don't think he has any illness because it would've gone away by now. He seems to be acting normal, and other than a big bump on his head, doesn't have any signs of sickness

Discussion Starter · #1 · Oct 1, 2011. Hello everyone, I've had my 5 fancy goldfish for almost 1 year, 4 of them started off as 1 inch and now they are about 4 now. The other is a larger 5 gold fish. I believe they are ryukin gold fish. I have the 5 of them in a 35 gallon tank, 95gph filtration, heater to keep the temp btw 72-75 I've been keeping betta fish for over 25 years and have enjoyed every minute of it. I started Betta Fish Center in 2005 to share my passion and knowledge about these amazing little creatures with others. I hope you enjoy the information on this website and that it helps you keep your betta fish happy, healthy and thriving for years to come Let the Guppy fish fast for three days and feed a boiled pea on the 4th day. Reduce water flow and increase the temperature. Add aquarium salt. 4. Fins or Tail Rot. Fins rot is a common disease in many freshwater or pond fishes like betta fish. It is caused by bacteria in most cases. In this disease, fish fins are rotten and damaged. Sympto The New Angle On Do Betta Fish Play Dead Just Released. It is intriguing to remember that the fins of some male bettas are the very same length as their entire body. If a male betta gets bored, it might begin to bite at its own fins that may lead to disease. Based on the breeds, betta fishes arrive in all kinds colors

Betta Fish Tumor Guide (Can You Save Them?) - Betta Care

  1. 3. The Water. Yet another reason why your Betta fish is not eating pellets could have to do with the water, specifically the temperature of the water. Betta fish are tropical fish that prefer fairly warm waters. Their metabolisms are actually affected quite drastically by the water temperature
  2. What a fish eats, the color of the environment, the parameters of the water and the intensity of light the fish is exposed to are all by themselves factors that can make a fish change hue and color intensity. Some other factors could be stress and..
  3. e which treatment it needs. 1. Hole in the Head (HITH) Oscar Disease. The exact cause for HITH has not been deter
  4. However, just like their wild cousins, captive betta fish do need to sleep at night. So, you must turn out the tank lights overnight to replicate the natural day/night cycle that the fish enjoy in the wild. The easiest way to do that is by turning the tank light on when you get up in the morning and switching it off when you go to bed at night
  5. e and watch your betta in order to deter
  6. Why is there a string hanging from my goldfish? White stringy excrement is often indicative of an internal parasite. A small piece of cooked pea will act as a laxative and may clear the parasite. If that doesn't work, you could feed flakes or pellets treated with antibiotics. have read about treating the water with Metronidazole in some articles
  7. If you want to learn more about aquascaping a betta fish tank, check out my article on designing a dragon stone aquascape for betta fish. 3) Keep a Betta First Aid kit: Keeping betta medication on hand is a smart idea because pet stores often do not carry betta specific medications or may be out of stock

Betta Fish Diseases - How To Treat A Sick Betta Fish

The problem occurs in fish that have a swim bladder, an internal balloon that helps them control their buoyancy. Besides, can a betta fish go blind? I had a betta that went blind, so it is possible. Room mates nearly 2 year old betta went totally blind about 2 months before he passed. Yep, most of my bettas have needed help with eating as they. 2. I dont think it's ICH.It looks too fluffy. There is a syndrome called hole in the head. You might have heard/read of it. You can tell a fish has hole the head when it gets a white puffy thing on it's head-pretty much what happened to your fish. It's either fungal or bacterial,both infections look the same For example, if you have a decoration and your fish runs into it, the tissue around the eye can bruise and swell. The body does this in order to speed repair of the surrounding tissue, but if the injury is severe, the swelling may put too much pressure on the eye. In this instance, the most important thing you can do is monitor your fish Betta fish are also known as Siamese fighting fish.They flare their gills when they are ready to fight. This makes them appear larger since fish do not have very good eyesight. They also fan their gills when they are trying to court a female Betta. A female Betta will fan her gills as a sign to the male that she is willing to mate or to another. Q) I have two fancy goldfish: a red Ryukin and a calico Fantail. The Ryukin has developed a lump on one side, although it seems fine otherwise. The Fantail, which you can also see in the photo I've sent, spends most of its time sitting on the bottom, just coming up to the surface to feed. Both fish feed well and water parameters are spot on

Betta still twitching/jerking Healthy Bett

Fuzzy spots on skin, mouth. Bacterial infection (Flavobacterium) Isolate sick fish. Add antibiotics to the water and use antibiotic-medicated food. Maintain good water quality. Quarantine any fish with signs of the disease. Bumpy growths on skin, fins. Carp Pox My koi betta fish is not eating? Mature females have an egg spot which resembles a white lump. It is found between the head and ventral fins. However, young females do not have this spot. Males have a bulkier body and their head is curved while the females have a streamlined body. The males are brightly colored compared to females. This. Symptoms of hole in the head disease. Being a progressive disease, the symptoms differ according to the severity of the condition. Besides the small lesions that appear on the head and lateral lines, the following symptoms occur as the disease progresses [3, 11]. The lesions getting bigger and hollow, also spreading to the mouth, gills and the region around the eyes [3, 11] Not Hiding. Another sign of a happy betta fish is one that is out and about in his tank and easily found from day to day. If you have trouble finding your betta in the tank because he is hiding all the time, this is a sign of a stressed or possibly ill fish. While bettas do enjoy spending time in ornaments that have hiding spots, they shouldn't be in them all of the time and ignoring the rest.

Betta Fish Tumor 101 (Symptoms, Treatment & Prevention

Unhealthy Fish. Clamped. If a fish looks like it's holding its fins close to the body or like they're stuck together, it's a sign of discomfort or illness. Deteriorating. If a betta's fins are in tatters or vastly missing between the rays (the bones in the fins), then a bacterial infection may be present The Betta behavior that resulted in the sport of Siamese Fish Fighting is still a distinguishing trait of the modern-day Betta despite the customized breeding over the last one hundred years. Warriors by nature, their aggressive behavior stems from the male Betta's need to protect his territory my betta has the same thing as #70 its buldge is right before you get to his fin help me please!! (No answer yet!, 2427 views) I have had my betta for eight months now, and he has been fine up untill last week. I noticed that he has been sinking to the bottom of his bowl (that he shares with two neons) and he won't even come up to eat

Why does my betta fish keep putting his head in the rocks

Let's take a closer look at six common causes for the oily film on top of your fish tank. In some instances, you can solve your oil problem just by fixing the cause. 1. Oil from your hands. Let's face it, there are going to be lots of times that you need to get your hands wet Discus Fish Disease, Symptoms and Treatment Guide. Your discus fish are important to you and keeping them free of illness is a big challenge. Most discus fish are being imported or sold from hobbyist to hobbyist, making it a risk to go from bag to tank Ick, also known as 'Ich' or 'white spot', is an external parasite that latches onto the body of a betta, causing irritation, itchiness and malaise. The parasite stays on the fish for up to 4 or 5 days before it drops off, reproduces, and then latches back onto the fish. Ick is fairly easy to treat - especially if you catch it early on. Make sure you know your fish's ideal diet and do your best to adhere to it. Finally, disturbances of a fish's habitat such as banging or loud noises can lead to stress. If you have children, make sure they know to respect the fish's home. Next Steps: If you determine that your fish is suffering from stress, you should act quickly to treat.

Fish Has White Lump On Head! Help! (with Pictures Now

Add one teaspoon for every gallon of water in your tank. The salt helps with digestion issues since these are the most common issue with Betta fish. Do your 50% water changes quite frequent like maybe once every 2-3 days. If your tank has gravel on the bottom.. get rid of it if possible Also remember, the betta fish stomach is only the size of their eyeball and it takes these fish literally 2 weeks to starve to death. They do not eat as much as we think they do. It would take a heck of a lot of starvation to kill these fish due to not eating Treat the fish with Oxolinic Acid + Oxytetracycline in the feed. Mix 1 teaspoon of each medication with 2oz. of water. Spray contents over 1 lb. of koi pellets with a spray bottle. Let air dry and feed to the fish for 2 weeks. Use Forma-Green in the water to prevent fungus from attacking the ulcerations

What Is The Lump On The Side Of My Betta? My Aquarium Clu

So my shubunkin with the lump, still has a lump on one side, but now he has these white spots growing on both his front fins. He is a male, so disregard the white specs on his gills. I am not sure if it's a fungus, bacterial or otherwise. Look closely and you'll see the white stuff on his fins. His lump does seem a little bigger Hi there, I have about 30 albino corydoras that I hatched in my own tank. Free. Way too many eggs and fry were viable, oops! Please, only consider if you're willing to take a minimum 10 fish. Minimum group of 6 anyhow (shoaling fish). Pickup only in Arlington MA. This weekend, or evenings next.. Your Molly fish might be shaking its head because she is stressed. If she is sitting still and wiggling its called the shimmies. Check your water to be sure its not that stressing her. Mine do it sometimes but I never know exactly whats bothering them. They have always come back from it though so its not deadly or even treatable just be sure.

10 Betta Fish Diseases and Symptoms (and How to Treat Them

Hole in the Head Disease is curable, but more importantly, it is perfectly preventable. Regular tank maintenance, i.e. water changes, removing solid debris from the tank and filtration system will help keep the water in good condition. Good water conditions are the key to preventing Hole in the Head Disease in Oscar Fish My Shih Tzu is 3 and she had the same problems red skin really bad diarrhea and throwing up did tons of tests fecal tests blood tests spent so much money on different dog foods when all we had to do was change her diet to a prescription food because she was allergic to the wheat in the food I have her on Hill's prescription diet digestive care i/d hopefully that will help! good luck My red veiltail betta fish has a bent top lip and one of his scales if pointing out and what I think he has on his lip is a small tumor it's not really big, or bumpy , but I think it's a very small tumor growing on his bumpy top lip. He may have drowsy as well, and I don't know how to help/care for him much Chopping off your head quickly? My aim with a butcher knife is questionable, at best. Flushing you down the toilet? While you were still alive, Daisy, I couldn't do it. I spent more money on treatments that wouldn't work. I was a regular at PETCO, the insane person who should have a dead Betta fish instead of a constipated and immortal.

What causes bumps on goldfish? - Aquatic Veterinary Service

If it is lymphocystis, I'd remove it asap. It is infectious. I think my new betta has it, which is why he is no longer in the 50 litre with other fish but on his own in the 25 litre (vacated when my 2 year old betta died). Having said that, my betta acts like there was nothing wrong. He swims fine, has a very healthy appetite, and begs for food. The betta often looks like it takes it a great deal of work to swim to the bottom (if floating) or reach the surface (if sinking), and will pop back up like a cork or sink like a stone. A constipated fish may look bloated (slightly or greatly), or seem to have difficulty passing feces (stringy, trailing, or exceptionally large poop) I have two male bettas one in a 25 gallon and one in a 50. obviously, I really want to get more fish in my 50 gallons because 50 is a lot for just one betta. I would like some more fish in my 25. I would like some snails and khuli loaches in both, and some ghost shrimp in my 50 some Mollys and platies in my 50 as well However, if you bruise easily, a minor bump — one you might not even notice — can result in a substantial bruise. Some people — especially women — are more prone to bruising than others. As you get older, your skin also becomes thinner and loses some of the protective fatty layer that helps cushion your blood vessels from injury

Bump Under Betta Fish Neck My Aquarium Clu

Your head sores last more than a few days or won't heal. You have a lot of sores or they keep coming back. You've noticed any changes in the shape, size, or color of bumps or lumps on your scalp Betta Colors Hello, I've had my beta since September, and I never really noticed until a couple of weeks ago, that his colours aren't as vibrant as before. His beautiful tail was white at the tips and pure. Right now, they have some streaks in them. He's eating normally (twice a day with Hikari Betta bio-gold pellets) and makes his bubble nests (if anything, makes them more than he used to) Another difficulty is the fact that human-fish communication is severely limited. This makes even knowing when a fish is sick difficult to observe. This is why we need to be vigilant when we do spot possible symptoms. In this AnimalWised article on my fish is swimming sideways, we look at the reasons for this this phenomenon. One of the most. When I purchased this fish it had a red spot on its head. I did nothing about it and soon there were more. The spots seemed to move around like parasites. Sometimes white cotton-like tufts would appear. I have treated the fish with Mardel's Maracide and Maracyn-II. I followed the instructions and the fish seemed to get better Why Does My Cat Turn Around Before Settling on a Blanket? Krissy Howard Behavior Read. 19 Dogs on Surf Adventures in The Ocean (& Kiddie Pools) Maggie Hira Adorable Read. What Do Cats Hear? Vanessa Salvia Tell Me Mew Read. Just 17 Pets Being Ridiculously Cute.

Fish can turn black as a response to discus disease, a seasonal, flu-like illness that causes the fish's skin to come off in patches and turn dark. The fish may initially have small white patches over the body, and the disease is most common after placing new fish in the aquarium. Treatment for discus disease includes treating the tank with. How to Prevent Neon Tetra Disease. The best prevention is to avoid purchasing sick fish and to maintain high water quality. Also, it's important to remove sick fish from your community tank as soon as possible: there is no real cure for the disease, and more so, many fish will eat other dead fish when given the chance I have a fish. He is a male betta, a nice dark magenta colour, and his name is Aleister. I bought him back in September to cheer up my dorm room a bit, and he has been consistently good company ever since Lesions rupture, but nothing is released. Your fish are affected by open Tuberculosis. Warning: This disease can be spread to humans. Do not put your hands or arms in the tank if you have cuts or open sores on them. Treat with: Kanamycin + Vitamin B-6. Treat for up to 30 days. Isolate this fish and treat them for 30 days If so, go to 10, if only in one eye, go to 9. If the fish does not exhibit exophthalmia, go to 11; Commonly, exophthalmia that develops in one fish, in only one eye is a result of physical trauma. Mild bilateral exophthalmia in one fish can have many causes. Review the fish's history for possible infection-associated problems