Our turtle used to leave a survivor out of every batch of feeders. I used to tell people the loner sold out his friends in exchange for his own life XD
Seriously! I've got 3 turtles a 5" Oscar and a striped rapheal catfish, and about 2 dozen guppies that have been in the tank for over a week now.
They used to take down 20 guppies in a night. So far only about 6 in a week.