Rostanga arbutus (Angas, 1864)
Uncommon in the Solitary Islands Marine Park. Endemic to New South Wales waters.
Frequents tidal rock pools and platforms, recorded from a depth of at least 6m.
Often found in association with similarly coloured encrusting food sponge, Clathria sp. A small species it is easily overlooked amongst the algal turf of the rock platform. Grows to about 10mm.