Hyperoglyphe perciformis, the barrelfish is a primarily bathypelagic species of ray-finned fish belonging to the family Centrolophidae.

[3] The barrelfish primarily has a brown to black coloration on their back, fading to gray on the sides of the body.

Younger barrelfish have smaller eyes compared to adults, as they do not inhabit deeper water until they grow larger.

[3] Young barrelfish inhabit all levels of the water column, and have a habit of examining any floating object which crosses their path.

[1][3] Recreational anglers also occasionally catch barrelfish whilst deep dropping for snappers and groupers, or fishing for swordfish.