I haven't seen this before, one of my zebra danios has a weird bump that looks kinda like an adams apple on the bottom of his body. well i guess it doesnt look like an adams apple per say, but if a fish had an adams apple thats where it would be.
May be a tumour. My cichlid had a similar lump which grew to the size of a pea after a few months. Sadly there is no cure -he died a few weeks agoI haven't seen this before, one of my zebra danios has a weird bump that looks kinda like an adams apple on the bottom of his body. well i guess it doesnt look like an adams apple per say, but if a fish had an adams apple thats where it would be.