Cocos Island, several hundred miles off the west coast of Costa Rica, is home to a large population of Scalloped hammerhead sharks (Sphyrna lewini).  It is on the globally endangered species list.

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Cocos Island, several hundred miles off the west coast of Costa Rica, is home to a large population of Scalloped hammerhead sharks (Sphyrna lewini). It is on the globally endangered species list.