Tony Wu / Humphead parrotfish (Bolbometopon muricatum) shoal spawning in early morning, part of mass aggregation of thousands of fish. Caroline Islands, Palau.

Gary Bell/ Oceanwide / Veined Octopus (Octopus marginatus) predating urchin, Anilao, Philippines

Gary Bell/ Oceanwide / Candy Cane Sea Star (Fromia monilis), Anilao, Philippines

Gary Bell/ Oceanwide / Oriental Flying Gurnard (Dactyloptena orientalis) with pectoral fins extended in defense posture, Anilao, Philippines

Tony Wu / Twinspot snapper (Lutjanus bohar) shoal rushing up to spawn, releasing a cloud of milky white sperm and eggs in the water column. Caroline Islands, Palau, November.

Tim Fitzharris / Green Sea Turtle (Chelonia mydas) and Orange-striped Triggerfish (Balistapus undulatus), Apo Island, Philippines

Tim Fitzharris / Green Sea Turtle (Chelonia mydas) swimming with a school of butterfly fish, Apo Island, Philippines

Georgette Douwma / Bigscale soldierfish (Myripristis berndti), Sweetlips, Philippine chromis with Blueline snappers in background. Komodo National Park, Indonesia

Gary Bell/ Oceanwide / Hawaiian Sea Urchin (Tripneustes gratilla), Anilao, Philippines

Gary Bell/ Oceanwide / Sea Urchin (Toxopneustes pileolus), Anilao, Philippines

Gary Bell/ Oceanwide / Long-spined Sea Urchin (Diadema sp) group, Anilao, Philippines

Gary Bell/ Oceanwide / Sea Anemone (Alicia rhadina), Anilao, Philippines