My fighting fish henry has a growth white lump on his tail which i have noticed now has a hole through it. I have been treating him with blue planets fungus care, have seperated him from the other fish and change the water regularly. I have no idea what it is and he is having trouble swimming.

I've noticed this strange red lump on my fish's ventral fin. At first I thought he just had a weird fin, but it is only on one side and looks very much like a growth of some sort. I'm wondering what it is or if anyone has ran into this sort of thing before. He is very active, feisty, has a...