Biscuit Stars (Tosia australis) abound under Edithburgh Jetty.

They are so common and so generally stationary they are often overlooked by divers for the intricate beauty in their last (note the term ‘last’ is used to describe the hard structure making up the shape of the starfish).

This pair side by side highlight differences in colour but note how the actual structure is the same.

Photo: Robert Rath, ‘Sea’n Biscuits’ 1/125 f/14 ISO320 40mm