no, no and no. Sorry if that seems rude and over the top but many people make that mistake and the lions don't live long cause the can not digest the fats in the gold fish. There diet are live foods like ghost shrimp or damsels, chromis, even guppies and mollies are ok. My two are still not eating yet but it's only day two and stress causes lots of issues, hoping to get them started on frozen food like silversides and krill or even table shrimp. If looking to keep any kind of predator fish it's good to do your research on them first I found http://www.lionfishlair.com a good place for info
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