Most Are great tropical fish for beginners, but some are fussy eaters and could be improved suited to expert aquarists. Image Editorial Credit rating: Wikimedia Commons The Devil’s Gap Pupfish has become the rarest fish on this planet, identified only in a single, distant area. This very small, lively fish https://share.evernote.com/note/04174681-7640-4b90-ddbd-dadf20f96304