Brittle stars live on spiny sponges and other sessile animals at the bottom of the deep sea, as well as by themselves and in abundant masses directly on the seafloor.

What ocean do brittle stars live in?

The brittle stars of the Arctic live at various depths, with some species occurring deeper than 3,500m. The largest observed assemblages in the Alaskan Arctic occur on shallower ocean shelf waters, and generally consist of Ophiura sarsii and Ophiocten sericeum brittle star species.

Do brittle stars live in salt water?

The Fancy Brittle Star enjoys an established saltwater aquarium with plenty of live rock for hiding. It is nocturnal and often hides under the rocks during the day. At night, it comes out to eat detritus and small organisms.