Crabs are frequently preyed upon by halibut, dogfish, sculpins, octopus, otters, sea turtles, and even other species of crabs. Young crabs may sometimes be eaten by their own species. Crab larvae...
''The Alaskan King Crab also has several natural predators that consider them a food source. Fish such as the halibut or pacific cod are good examples of predators as well as sea otters, octopuses...