Common starfish Common starfish The common starfish or common sea star ("Asterias rubens") is the most common and familiar starfish in the north-east Atlantic. Belonging to the family Asteriidae, it has five arms and usually grows to between 10–30 cm across, although larger specimens (up to 52 cm across) are known. The common starfish is usually orange or brown, and sometimes violet; deep-water specimens are pale. The common starfish is to be found on rocky and gravelly substrates where it feeds on molluscs and other benthic invertebrates. The common starfish normally has five arms, broad at their base and gradually tapering to
Rhacophorus rhodopus spots all over the back, usually forming an X-shaped pattern behind the head and sometimes stripes across the lower back. Sometimes, there are a few large white spots on the back, also. The hind legs and the upper sides of the arms are for the most part or entirely the color of the back; there are usually dark bands across the upperside of arms and hind legs. The sides, belly and toes are dark yellow, becoming dark pink in preserved specimens. Behind the arms, there is almost always a conspicuous large black spot on the flanks. The well-developed webbing of