Psilaster andromeda worm is approaching maturation, it moves into the pyloric caeca and at the same time loses all its cilia. Psilaster andromeda Psilaster andromeda is a species of starfish in the family Astropectinidae. It is native to the northeastern Atlantic Ocean where it occurs at abyssal depths. "Psilaster andromeda" is a deep water species of starfish native to the northeastern Atlantic Ocean. Its range extends from Murmansk and the coasts of Norway to the Faeroes, the Kattegat, the United Kingdom and the Bay of Biscay. It is present in the Rockall Trough. It is found in Norwegian fiords on muddy bottoms
Rockall Natural Resources, to conduct a seismic survey of the Rockall Bank and the Hatton Bank in July 2004, as part of the Irish National Seabed Survey. The island's only permanent macro-organism inhabitants are common periwinkles and other marine molluscs. Small numbers of seabirds, mainly fulmars, northern gannets, black-legged kittiwakes, and common guillemots, use the rock for resting in summer, and gannets and guillemots occasionally breed successfully if the summer is calm with no storm waves washing over the rock. In total there have been just over twenty species of seabird and six other animal species observed (including the aforementioned molluscs)