I got a Cory today and I scooped him out of the pet store bag to put him in the tank....I put the net in my tank and he wasn't swimming out.....So I tried to guide him then realize a piece of the top of his fin was stuck in the little hole in the net.... After like 5 minutes I finally got him free...On the top part of his fin like right on his body it is a little red... He is swimming around fine now and eating too, so hopefully he will be ok