Exposing its mantle and inhalant siphon, a giant clam (Tridacna gigas) is in the ideal position for a diver's examination in the Coral Sea off the coast of Queensland, Australia.

As if translucent spaceships in a night sky, hooded nudibranchs pulse in the waters of God's Pocket Marine Provincial Park in British Columbia, Canada.

It provides large quantities of photos of coral reef and related exhibition information on Marine organism.