Close-up of the mantle and siphon of giant clam, Sabah, Malaysia, Borneo, Southeast Asia, Asia

Needle cuttlefish (Sepia aculeata) eye and siphon, Dumaguete, Negros Island, Philippines, Southeast Asia, Asia

Fluted giant clam (Tridacna squamosa), Rongelap, Marshall Islands, Micronesia, Pacific

Fluted giant clam (Tridacna squamosa), Rongelap, Marshall Islands, Micronesia, Pacific

Eye and siphon detail of reef octopus (Octopus cyanea), crawling over reef, Ailuk atoll, Marshall Islands, Pacific

Reef octopus (Octopus cyanea) eye and siphon detail, Rongelap, Marshall Islands, Micronesia, Pacific

Reef octopus, Octopus cyanea, eye and siphon detail, Rongelap, Marshall Islands, Micronesia

Fluted giant clam, Tridacna squamosa, siphon detail, Namu atoll, Marshall Islands (Pacific).

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