hi matthew, lion fish tend to prefer there food fed live.I give my large volitan live prawns-shrimps-damsels,ect, you have probably noticed that they tend to spend a lot of there time just hanging around, just waiting for live prey to pass by and trigger there hunting instinicts. Remember not to feed them goldfish, as this can cause liver problems in marine fish. I have read that mature volitans eat once a week in the wild, but it is probably best to feed them every two days in captivity.