I feed this dude every 2 days. He gets 1 molly which was fed with mysis and other dry food. Basically you feed the molly marine food before feeding it to the Frogfish. So he gets the nutrients! As for feeding, they are hunters.. so when the fish swims past it, the mouth will snap/gulp the fish. They will usually perch on rocks and stay still while waiting for the prey. Sent from my iPhone using Tapatalk