Sea cats can survive in both fresh and salt water, though most live in the ocean, where they can hunt a varied and consistent supply of food. A sea cat's diet typically consists of fish, crustaceans, and aquatic mammals (including seals and otters), but the creature's overpowering predatory and territorial instincts often lead it to attack ocean birds, humanoids, and even other aquatic predators like sharks and crocodiles. Coastal fishermen in areas where sea cats are known to dwell watch vigilantly for the predators, because the beasts have learned that netted or hooked prey is easier to kill and steal from the line.