the answer is both alone when lost useussaly together though
They are loners, rarely collecting in groups.
sea anemones live in groups
the water
Sea stars live in all parts of the world in every ocean. Sea stars have a wide distribution throughout all of the world's temperate and tropical seas. Numerous species are found in each of Western Australia's marine parks. For example, 170 species of sea stars, sand dollars, heart urchins and sea cucumbers are found in the Montebello Islands Marine Park alone.
britle stars are small and live in coral reefs and are eaten by GIANT sea stars
Tropical
Niche
they have sex and they live in vthe ocean
in groups
As far as i know they live in the sea. also in little tide pools that support sea life
Sea stars live along the rocky shores in the tide pools.