Lino fish are slow hunters. I had a Fu Man Chu lionfish that had to tricked into eating frozen fish. Using a pair of long tweezers holding the tail of a silverside and moving it like a fishing lure. After a few weeks he got the idea. After that he would eat Mysis Shrimp, clams, raw Shrimp and other meaty foods. But only by hand. I hope this helps and good luck.