Keep a reef tank means housing an assortment of corals, anemones and invertebrates as well as saltwater fish in an aquarium. Not all marine aquarium fish species are suitable for reef tanks – many will tear up corals, consume other fish or otherwise destroy tank inhabitants. Below are a selection of marine fish considered safe by experienced reef tank keepers – though no guarantees exist when it comes to keeping live animals like aquarium fish; should something go amiss simply remove your new tank critter before it does any irreparable damage!