Lion are easy to keep depending on the type you get i have owned 3 types antenneta, radiata, and volitan. i lost my antenneta when i moved my nitrites went up and he died. but he was easy to keep and one of the better looking ones to. the radiata i owned was hard to keep and he just died now i have a volitan and he is doing very good and he is in my opinon the easy one to keep. the only hard part withe owning a lionfish i getting him off live food on to silversides, you do this because the freshwater guppies and shrimp you get do not have the proper nutrition for the lionfish. the way i do it is feed guppies untin it is large enough to eat krillthe as is grow larger i use silversides and krill.