Giant clams in the clear waters of the Marovo Lagoon, Solomon Islands, Pacific

A huge giant clam, Tridacna gigas, grows on a shallow coral reef amid the tropical islands of Raja Ampat, Indonesia.

A massive giant clam, Tridacna gigas, grows on a shallow coral reef in Raja Ampat, Indonesia.

A colorful soft coral adorns a giant clam, Tridacna sp., growing on a healthy reef in Raja Ampat, Indonesia.

Giant clam (Tridacna gigas) and tourists visiting giant clam farm, Makogai, Lomaviti, Fiji, Pacific

Farming giant clams (Tridacna gigas), Makogai, Lomaviti, Fiji, Pacific

Giant clams (Tridacna gigas) at giant clam farm, Makogai, Lomaviti, Fiji, Pacific

Giant clam (Tridacna gigas), Rongelap, Marshall Islands, Micronesia, Pacific

Fluted giant clam (Tridacna squamosa), detail of mantle and eye spots, Rongelap, Marshall Islands, Micronesia, Pacific

Giant clam (Tridacna gigas), Rongelap, Marshall Islands, Micronesia, Pacific

Giant Clam & diver. Raja Ampat, Papua, Indonesia

Giant clam (Tridacna sp.), Pohnpei, Federated States of Micronesia, Caroline Islands, Micronesia, Pacific Ocean, Pacific

Diver with giant clam

Giant clam (Tridacna sp) detail of mantle and eyes, Dauin, Negros, Philippines, Southeast Asia, Asia

Giant clam (Tridacna gigas).

Giant clam (Tridacna gigas).

Giant clam (Tridacna gigas), detail of mantle covered with eye spots, Rongelap, Marshall Islands, Micronesia, Pacific

Giant Clam Tridacna sp. Gili Islands, Lombok, Indonesia

Giant clam, mantle detail, Tridacna gigas, Rongelap, Marshall Islands (N. Pacific).

Giant clam, Tridacna gigas, siphon detail, Rongelap, Marshall Islands, Micronesia

Giant Clam Farm, Tridacna gigas, Makogai, Lomaviti, Fiji

Syphon of giant clam (Tridacna gigas), Clam meat, detail, pacifica, Great Barrier Reef, UNESCO World Heritage, Australia, Oceania

Fiji, Indo-Pacific sergeant major egg mass on the shell of a giant tridacna clam (Tridacna gigas).

This Common Scorpionfish (Scorpaenopsis oxycephala) is perched on the mantle rim of a Giant Tridacna Clam (Tridacna gigas). It's venomous spines can inflict a painful wound, Philippines