fish eat anything. I proved this one time. I was spearfishing near an old wreck which had a lot of people snorkeling around it. I was at that point where I couldn't hold it any longer. I decided to dive down about three metres and take a dump. Firstly, it didn't drop. Even though this seems obvious, for some reason, my brain still expected it to drop. It began to float up right past my face (which was very scary) and towards the surface. Before it got there, about a thousand small fish targetted it and completely devoured the turd within about three seconds. It was both disgusting and amazing all at once. I swam back to the surface and never spoke another word about the incident until now.