The lion fish is of no threat to the eel. The lion fish is a threat to a fish that can be gulped in one slurp, the body of the eel is too long for the way he eats. As an example, a 3" fuzzy would be a threat to a 2" dotty back but not to a 2" clown. The thin body shape of the dotty back makes it easy slurping, but the rolley polly body shape of the clown makes it more difficult. If you raise a small dwarf lion on dead food; although possible, he will be most likely not interested in chasing, stalking, and wrestling down something live. But an easy slurp, he would not pass it up, so shrimp will be out of the question, as well as a clown goby and the likes.