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
Trough (meteorology) Trough (meteorology) A trough is an elongated (extended) region of relatively low atmospheric pressure, often associated with fronts. Troughs may be at the surface, or aloft, or both under various conditions. Most troughs bring clouds, showers, and a wind shift, particularly following the passage of the trough. This results from convergence or "squeezing" which forces lifting of moist air behind the trough line. Unlike fronts, there is not a universal symbol for a trough on a weather chart. The weather charts in some countries or regions mark troughs by a line. In the United States, a trough may be marked