Well Sunday I went fishing in the lake not far from my house. I had caught a few brim and when I was about to leave I cast out and caught a clam(don't ask me how but I did,lol) so I decided to bring him home. I washed him off and made sure he wasn't covered in algae and then researched if he could harm my fish. The only thing it said was the larva they release when they release them and it hurts my fish gills. But it said that's only if I have more than three. The lake is also for drinking water so no raw sewage could be contaminating the tank. So I put him in my tank and he immediately dug through the rocks and is laying sideways with his tentacle (idk what else to call it) waving about catch food and particles. He seems fine and my fish don't bother him at all. Do you think I should keep him in there?