That, Craig, is a very interesting little fish. Because of the barotrauma from being brought up from such a depth, I found this one a little hard to identify, only being able to suggest it appears to be a member of the subfamily Anthiadinae in the family Serranidae (groupers). But when the specimen was indeed donated to the University of Hawaii, Jim Beets and Jack Randall identified it as a threadfin perchlet (Plectranthias kelloggi). This deep-sea grouper species is recorded to grow to only around 8 inches long, so your capture is pretty much as big as they get. Randall considers these fish “not rare,” but admits they’re “not often caught” by recreational anglers due to their relatively small size and the depths at which they occur. Perchlets are distinguishable from other members of the family Anthiadinae by the pale vertical stripe down the midbody, as well as the distinctive filaments on the rear of the dorsal and caudal fins. This species is known to occur in about 700 to 1,200 feet of water over rocky or sandy bottoms in several areas of the tropical central and western Pacific Ocean, including off Japan, New Caledonia and Hawaii. The fish in each of these areas are thought to be different subspecies. Stomach-content analyses suggest they feed mainly on small benthic crustaceans and finfish.