Juergen Freund / Details of Thorny oyster (Spondylus varius) with "eyes" in its mantle edge near the shell, New Ireland, Papua New Guinea

Juergen Freund / Details of shell, eyes and mantle of Variable thorny oyster (Spondylus varians / varius) Batangas, Philippines

Juergen Freund / Thorny oyster (Spondylus sp) camouflaged on coral reef, Komodo NP, Indonesia.

Juergen Freund / Thorny oyster (Spondylus sp) close up mantle and eyes, Bali, Indonesia.

Juergen Freund / Honeycomb oyster (Hyotissa hyotis) on coral reef, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Details of a thorny oyster (Spondylus varians / varius) with "eyes" in its mantle edge near the shell, New Ireland, Papua New Guinea

Juergen Freund / Variable thorny oyster (Spondylus varians / varius) and featherstar on coral reef, Misool, Raja Ampat, West Papua, Indonesia, January

Juergen Freund / Thorny oyster (Spondylus varians / varius) and featherstar on coral reef, Misool, Raja Ampat, West Papua, Indonesia, January

Tim Laman / Coral reef detail with Soft corals, sponges, and a Zigzag oyster (Lophia folium) Raja Ampat Islands, West Papua, Indonesia, April 2007

Juergen Freund / Detail of mantle of Giant clam {Tridacna gigas} Indo-pacific

Juergen Freund / Detail of syphon of Giant clam {Tridacna gigas} Indo-pacific