Just notice a zebra dannio with a chunk of flesh missing from one side. Poor fish is swimming with a hunched back. Should I euthanise him or try melafix.
Thanks for the quick reply. It looks like a bite but he's only in with other dannios 4 glowlight tetras and a few baby corys and catfish. Nothing in the tank he could have injured himself on.
the other danios will attack him if they suspect ant weakness.
how big is this chunk that's missing? if it is more than 20% of the side then i'm concerned for secondary infection.
now when you say hunched up, does he have a kink in the spine?
this is often a sign of TB, although it could also be caused by a genetic defect.
Has it always been hunched or is this recent?
No he hasn't always been hunched up. They were a normal shoal. It's just since the 'bite' appeared. I think he's been attacked by some other fish. He doesn't have a kink in his spine but I noticed he has a lump around his belly. Have separated him into a confinement tank and he's a lot quieter.