Hi all, woke up this morning to one of my biggest cardinal tetras dead at the bottom with the whole of his belly missing? I only have these tetras , guppies and Cory Doras and assassin snail, I have had that fish a long time, I am just wondering if he died and other fish have eaten his belly? All the other fish seem fine along with my baby guppies. I know these fish can get a disease but not sure if it was sick or just died of age, don’t want other fish being affected if they eaten it, how will I know? Thanks