-5m, Dived on rock, Olango Island, Central Visayas, Philippines, 53.5mm.
The « Wheel-like Star » is a handsomely spinous turbinid ranging from Okinawa, Japan to Philippines to Malaysia to Queensland, Australia. An algae-grazing gastropod inhabiting mostly hard substrates such as rocks, it is a very comrn.on shallow water dweller inhabiting very shallow intertidal water to about -30m deep. The number of spines per whorl may vary from eight to 14; the length also vary greatly and long-spined specimens are often referred to as A. calcar f. aculeatus (Gmelin, 1791). In natural condition it is almost always heavily encrusted by various overgrowth and cleaning can be a time consuming and laborious task. Typical shell diameter around 35mm., very large specimens may reach 60mm.