So I got this bicolor angelfish about a week ago- has been happy and healthy as far as I can tell in a tank with one smaller black clownfish and a German cleaner shrimp and a few snails. I was just watching him swim around yesterday and I didn’t notice anything odd. Today I came home and saw this HUGE wound on his side and he was sort of floating around and then died about an hour later. I feel there is no way my little clown or shrimp could have done something like this- but I also don’t know what disease would have done this and that fast- no rocks were knocked over- I have no crabs or anything else In the tank other than what I listed. Any ideas? I’m so upset!