Adult green sea turtle (Chelonia mydas agassizii) underwater in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

A small, well-camouflaged cuttlefish, Sepia sp., hovers on a rocky seafloor in the Banda Sea, Indonesia.

Slime Star Pteraster tesselatus

Soft coral colonies (Dendronephthya sp.) and diver. Komodo, Indonesia, Pacific Ocean.

Giant frogfish (Antennarius commersoni) and diver. Cannibal Rock, Horseshoe Bay, Rinca Island, near Komodo, Indonesia.

Giant frogfish (Antennarius commersoni) Adult fish blends into a diverse coral reef. Cannibal Rock, Horseshoe Bay, Rinca Island, near Komodo, Indonesia.

Soft coral colonies (Dendronephthya sp.) growing on coral reef. Komodo, Indonesia.

Threadfin anthias (Pseudanthias huchti) swarm around a diverse coral reef. Komodo, Indonesia.

Brittlestars Ophirua sp.

Soft corals (Dendronephthya spp.) growing on diverse coral reef. Komodo, Indonesia, Pacific Ocean.

Copper Rockfish Sebastes caurinus

Netherlands Antilles. Bonaire, Blue Parrotfish (Scarus coeruleus) feeding on coral.

Canada, British Columbia, Giant Pacific octopus (Octopus dolfleini) changing colors on ocean floor.

Papua New Guinea, Milne Bay, Blue Spotted Fantail Stingray (Taeniura lymma) resting on ocean floor.

Hawaii, Day Octopus (Octopus cyanea) on colorful reef.

Hawaii, Day Octopus (Octopus cyanea) on ocean floor.

California, Baja, Socorro, Unidentified species of stingray on ocean floor, sunburst above.

Hawaii, Maui, Makena, Spearfisher diving into hole in reef.