Orange in colour, test is leathery, longitudinally ridged, and almost free from other animals and plants growning on it.

Specimens are found singly in cracks in rocks or wedged in between oysters between tide marks, but are rather rare.

Filters small plankton out of the water column.

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http://www.marinespecies.org/aphia.php?p=taxdetails&id=250333 (accessed 23/08/10) http://rsnz.natlib.govt.nz/volume/rsnz_76/rsnz_76_02_001510.html (accessed 18/09/10)