Sea Star; Dusky Pink
The Dusky Pink sea star belongs to the phyla Echinodermata and part of the Class Asteroidea. This Class includes all types of typical sea stars. This sea star has 5 short, blunt-ended arms with an arm radius of up to 6.5 centimetres. The body generally has multiple green tubercles over the aboral surface, contrasting with the dusky pink to reddish-brown body colouration, although occasionally it may be blue in colour. Dusky Pink sea stars usually live concealed under rocks or crevices during the day and moves about at night. The Dusky Pink sea star is endemic to Western Australia, found only between between Point Cloates and Cape Naturaliste, in coastal waters at depths of 0 to 38 metres. They can reproduce sexually or by simply splitting in half to form a daughter of the adult specimen. The resulting individuals can therefore have varying numbers of arms in various stages of growth.
Occurrence at the Busselton Jetty:
The dusky pink sea star occurs in abundance and is always available to view from the underwater observatory. They are seen on the concrete ledges, the jetty piles and commonly on the windows.
Image by: K. Linham