Juergen Freund / Silhouette of karst limestone outcrop and Coconut trees (Cocos nucifera) of Entalula Island at sunset. El Nido, Northern Palawan, May 2009.

Jeff Rotman / Blacktip shark (Carcharhinus limbatus) with symbiotic Pilot fish (Naucrates ductor) swimming below, Cocos island, Costa Rica - Pacific ocean.

Jeff Rotman / Whitetip Reef sharks (Triaenodon obesus) following scent trail in water column, Cocos Island, Costa Rica, Pacific Ocean.

Jeff Rotman / Whitetip Reef Sharks (Triaenodon obesus) following scent trail in water column, Cocos Island, Costa Rica, Pacific Ocean.

Jeff Rotman / DeepSee diving submersible at water's surface, being towed, Cocos Island, Costa Rica, Pacific Ocean. Property released Model released.

Jeff Rotman / DeepSee diving submersible, Cocos Island, Costa Rica, Pacific Ocean Property released

Flip Nicklin / Whale Shark (Rhincodon typus) surrounded by several scuba divers, threatened, Cocos Island, Costa Rica

Flip Nicklin / Two scuba divers swimming through sea cave with schooling Grunts, Cocos Island, Costa Rica

Flip Nicklin / Grunt (Haemulidae) school along coral reef, Cocos Island, Costa Rica

Flip Nicklin / Squirrelfish (Holocentrus sp) schooling at reef, Cocos Island, Costa Rica

Flip Nicklin / Squirrelfish (Holocentrus sp) schooling at reef, Cocos Island, Costa Rica

Flip Nicklin / Pacific Sailfish (Istiophorus platypterus) trio swimming off of Manualita Island on the west side of Cocos Island, Costa Rica