Likely Reef Tank Suitable
Likely Fish-Only Tank Suitable
These fishes belong in the Order Perciformes and Suborder Percoidei as members of the Family Opistognathidae (Jawfishes) consisting of 3 genera, and 100+ species.
Probably not what many would consider a reef aquarium fish because of its need for a deep substrate. Yet, they are peaceful and will do well in an invertebrate tank when provided a pebble-like substrate for their vertical burrows. They are carnivorous/plankton feeders, and mouthbrooders. You could not go wrong with an environment filled with various, easy to maintain soft coral/mushroom disc anemones, a deep pebble-like substrate, possibly located in some shallow wide-mouth jars, and few of these fascinating and intelligent fishes. Do not mix more than one species in the same aquarium.