Cushion Star (Cussion Star Asterina Gibbosa)
Found under large rocks and stones on the lower shore and the more exposed shore, it is also a common rockpool inhabitant. The cushion star is found as deep as 100m in the sub littoral zone. Cushions found lower on the shore are generally orange, whilst those specimens found in rock pools and higher on the shore are an olive green.
A. Gibbosa is an omnivorous scavenger eating microorganisms, decaying seaweed and dead invertebrates. It does this by inverting the walls of its stomach called lobes through its mouth. Along with P. Vulgata Cushion Stars are a protandrous hermaphrodite, maturing at about 10mm in diameter or 2 years as a male, then at 4 years old changes into a female this would be about 20mm. Females may lay up to 1000 orange coloured eggs under rocks in crevices and after 2 – 3 weeks these eggs hatch into tiny star fish. A cushion could live up to 7 years producing between 3 and 7 broods.
















