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If the lump is covered with scales, and the scales are a continuation of their normal scales / skin(?) then it is probably a tumor. It is easiest to check this by using a torch to directly shine light on the lump, but please don't shine it in their eyes! If it is not covered with scales, then it is likely to be an external parasite.

It is quite possible for Bettas to live a long-ish and happy life with a tumor, but sometimes the tumor affects more of their body than you can see, and they pass away.

Tumors are very common with Bettas, due to inbreeding and hormone therapy when they are young to make them grow quicker, to make more money.

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โˆ™ 2011-09-13 05:23:09
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Q: How can you tell a betta fish has a tumor?
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Related Questions

How do you tell a male betta fish from a female betta fish?

Normally the male betta fish has much longer flowing fins than the female.


How long does it take for betta fish to fight?

betta fish are unpredictable so you couldn't really tell


How can you tell if a baby betta fish is male or female?

The female betta fish has vagina lips on its anus.


Does a betta fish gain weight?

Yes a betta fish can become overweight if they are fed to much. You can tell a betta is overweight when their bellies are round and protrude away from their bodies.


How do you tell a girl betta fish from a boy betta fish?

It's all in the tail. the males is larger and longer and the females is shorter.


What happens if your Betta fish has a ball on it's neck?

I'm terribly sorry to tell you this, but it might be a tumor. :( bettas live 1-2 years, so it might be getting older which causes it to get a tumor. it may not be a tumor, and not all tumors are cancer. good luck all the best, Fishlover


How can you tell the difference between male and female Betta fish?

The male Betta fights with other male Betta and the female don't


How do you know how old your betta fish is?

Unfortunately, there is no easy way to tell the age of a fish.


How can you tell if a betta fish is sleep?

Betta fish sleep on the bottom of the tank. I've never seen one close its eyes but they will often rest on the bottom when there is no action going on around them. Betta like to be around movement. That is why we have my betta fish in our living room.


How do you tell if your betta fish is pregnant?

Female betta fish lay eggs. If the female has vertical stripes that stand out, she is going to lay her eggs soon.


What is the meaning of a betta fish tattoo?

A betta fish tatto would be a tattoo of a betta fish.


How do you know that a female betta and a male betta is going to be friendly?

It's very hard to tell mainly because betta fish are naturally aggressive fish. but if you look really closely the bigger the upper lip on the fish the more aggressive they will be. but to tell you the true it's a guessing thing you just have know after awhile of having many betta fish get more info on betta and follow me o my blog at *the link provided below.


How can you tell a male betta from a female betta fish?

The male betta always has longer fins. It is more colorful and prettier. The female betta is not so pretty with dull fins.


How do you tell how old a betta fish is?

the size of it's fins and body


How to tell that your betta fish is dying?

he is floating, not eating, laying on its side


Do girl betta fish make bubbles to tell you they are happy?

ya


Are betta fish salt water?

Betta fish - Siamese fighter fish are not salt waters fish. But there is another breed of Betta which is called a marine betta and they are salt water fish.


What preys on betta fish?

other Betta fish and the bigger fish.


How many fish can a betta eat?

Betta fish do not eat fish.


Are Betta Fish omnivores?

No betta fish are carnivores.


Can a betta fish live with a betta fish?

Betta fish are typically best as a solitary fish due to the fact that they will show aggression to another betta in the same tank


Can you put another fish with a male betta fish?

you cant put men betta fish with another betta fish cause they will fight till they die so no mabe girl betta fish if they like the men betta fish put not men betta fish only girl good luck


What all fish do betta fish fight with?

Betta fish fight will all fish. Even their own kind. If a betta has babies there is a good chance that they will eat the younglings. Betta babies are not born in the egg. They come right out as very small fish. Do NOT mix betta with betta or any fish.


What is a betta?

A betta is a fish of the species Betta, especially Betta splendens, commonly known as the Siamese fighting fish.


What kind of fish do betta eat?

Betta fish do not eat other fish.