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.

[5] The gonads of Psilaster andromeda are located at the base of the arms and each one opens through a single gonopore.

[6] A parasitic turbellarian Triloborhynchus psilastericola is often present in the coelom of the starfish and when the worm is approaching maturation, it moves into the pyloric caeca and at the same time loses all its cilia.