Usually keeping fish with turtles ends in disaster for the fish....usually. But there are some exceptions. I have a female convict cichlid that has beem living with my Musk Turtle for about 3 months now and I've seen no aggression what so ever between the two. The turtle totally ignores the cichlid as if she wasn't even there. Actually she follows the turtle around everywhere cleaning up his scraps. They're quite the odd couple. How long this relationship will last, I have no idea.