I doubt it is something like that. It looks better some day's and looks worse others. I couldnt get anything up close but I can try to get better detail.dead_letters said:my goldfish had something kinda like that around its fin.We were told it was a birthmark kinda thing and it didnt harm the fish.
No problem. Any idea is better than none. I'm not too worried about it because it is not happening to any other fish. I'm just worried about this fish itself.dead_letters said:mmm i dunno then.Ive got a fish that gets a red lump on its side every so often and when i push its scale down a little stone looking thing comes out,maybe its something like that,sorry if i cant help
Well its a fish only tank with no live rock. The fish is happy and eats a lot.Chasing Puck said:Sounds and looks like septicemia, but the behavior would be much different if that was the case--not eating, hiding most of the time. Monitor to see if the fish is getting stuck in the rocks--could be scratches. While it's unlikely that it would be just this fish, I'd also watch the tank at night, lights off, as well, to insure that it wasn't the result of a nocturnal hunter or pest. I'd probably move the fish to a hospital tank, JIC, and to allow it to heal fully.