JawFish
The two most commonly kept jawfish are O. rosenblatti and O. aurifrons
They prefer to hover up to 5' above their den, always having a 360° view of their surroundings. Without an extensive view in all directions, they will hang lower than usual or may only extend their head outside their den. This reclusive behavior also occurs when actively swimming fish are present.
Their dens range from 4 - 9" deep, extend nearly 9" wide, are 2.5" tall, and are comprised of mostly broken coral branches, pieces of coral limestone, bivalve and snail shells, and assorted pieces of hard material.
Food:
They feed entirely from the water column with roughly 85% of their diet being zooplankton.
Since the jawfish consumes a great deal of zooplankton, feeding is easy. Enriched brine, mysis, plankton, and Formula I should be readily accepted. If newcomers are finicky eaters, it may take live brine or live blackworms to entice a feeding response.
In passive tanks the jawfish will become an aggressive eater, actively roaming around the tank in search of its next tasty morsel. However, in a tank with active fish, especially those that are hyperactive at feeding time, spot feeding with a turkey baster is most likely going to be required
Tankmates:
Jawfish should be the first fish added to the home aquarium,It is harder to get them acclimated once other fish are established
So what fish make good tank mates for jawfish? Cardinalfish, anthias, assessors, blennies, pipefish, and dragonettes will do well. Most gobies and some wrasses will also do well. The general criteria would be a passive, slow moving fish that is nearly equal in size or smaller.
Hope this helps