HELP MY LMB - TUMOR

[MicropterusSalmoides]

here is a few pics this happend over night

there is a pic of the side w/ and w/o the tumour

 

[Nick660]

If it came up overnight I would doubt it's a tumour.
My guess it's probably an abscess of some sort.

 

[MicropterusSalmoides]

im not sure what an abcess is, but i woke up to him upside down this morning.

 

[Nick660]

im not sure what an abcess is, but i woke up to him upside down this morning.

sorry to hear.
(An abscess is like a pus filled cyst. Usually a bacterial infection of some sort.)

 

[guppy]

I agree that it is unlikely to be a tumor. It could be furunculosis, a pus filled abcess caused by a bacterial infection. Nitrofurazone may help.

 

[MicropterusSalmoides]

its too late to help now. after 1 night he had that, next night he passed away. he was my most prized fish too. raised him from a fingerling. when i netted him out he was just over 15"

 

[guppy]

Did you do a necropsy?