I had a chain pickerel at one time. It used to hover at the top of the tank. I wanted to get it off live asap so I used to stick a silverside in it's mouth as it opened. After a few weeks, I would drop cichlid stick loaded silversides head first (darting action) and it would snatch it. Unfortunately, unless it saw it I would have to net the silverside and keep trying til it decided to take it.