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

Jeff Rotman / Gills of Whitetip Reef shark (Triaenodon obesus) Cocos Island, Costa Rica, Pacific Ocean.

Jeff Rotman / Silvertip Shark (Carcharhinus albimarginatus) approaching cleaning station, Cocos Island, Costa Rica - Pacific Ocean.

Jeff Rotman / Silvertip shark (Carcharhinus albimarginatus) Cocos Island, Costa Rica, Pacific Ocean.

Jeff Rotman / Silvertip shark (Carcharhinus albimarginatus) approaches cleaning station, Cocos Island, Costa Rica, Pacific Ocean.

Jeff Rotman / Fisherman holding juvenile Hammerhead Shark caught in gill net, Santos, Brazil, Atlantic Ocean, January 2008 Model released.

Jeff Rotman / Juvenile Stingray caught in net, Brazil, Atlantic Ocean. Model released.