From the back of the box:

Bone-crushing crabs and prehistoric sharks plague the unknown waters of Pirate's at Ocean's Edge. Tempt Fathomless whirlpools promising uncharted territory rich with gold - or destruction to any foolish enough to enter.

The box contains six ships and/or Sea monsters, three crew or treasure cards, two whirlpool/island cards, complete game rules, one die, and a bonus pre-assembled Special Edition ship.