The lifespan of Pacific black hangers is generally about 5-7 years. Generally, the water temperature of Pacific black hanging in the aquarium is between 24 and 27 degrees, and the minimum aquarium size is more than 450 liters. It can be fed animal-based bait, and it is necessary to provide enough plant-based food such as seaweed and seaweed, which can enhance the body's immunity and improve its overall health. It can be fed by tying dried seaweed to the rock, or artificial plant-based food.

The body of the Pacific black hanging is uniformly black, and there is an inconspicuous yellow in front of the eyes Banded, with another dark brown spot behind the operculum. The fins are the same color as the body, the soft rays of the dorsal and anal fins are blunt and round, the base of the caudal fin has a white vertical band, and the end has a white edge, hence the name double-banded black hanging. The juvenile Pacific blackfish is quite different from the adult Pacific blackfish. The juvenile Pacific blackfish has a milky yellow body with blue wavy horizontal lines all over the body, yellowish dorsal fins and black anal fins, each with 5-6 white horizontal lines. As they grow, the body color of juvenile Pacific blackfish gradually changes to uniform black.