The beast of Cretacea

Aboard the Pequod, seventeen-year-old Ishmael arrives on the planet Cretacea to hunt down great ocean-dwelling beasts to harvest and send back to the resource-depleted Earth. But the ship's captain, Ahab, who lost his leg to the Great Terrafin years ago, is obsessed with hunting down the beast. The classic tale of Moby Dick as set in the future.