Diplasterias brucei is a species of starfish in the family Asteriidae. It is found in the Pacific Ocean and Southern Ocean. It is a predator and scavenger and is unusual among starfish in that it broods its young.

Description Diplasterias brucei usually has five arms, but in the vicinity of South Georgia, a six-armed form is common. This starfish varies in colour from a pale bluish-green to a yellowish or orange hue. The maximum size is about 25 cm (10 in) across.

Distribution Diplasterias brucei is found in the Pacific Ocean and Southern Ocean. In Antarctica, the species is found on the seabed in the Antarctic Peninsula and in East Antarctica, at depths down to about 725 m (2,400 ft).

Ecology Diplasterias brucei is one of the more conspicuous animals in the zone deeper than 33 m (110 ft) which is the lower limit for anchor ice formation. This zone is characterised by a layer of sponge spicules and dead mollusc shells a metre or more thick, swathed in living sponges.