Gray whale Gray whale The gray whale ("Eschrichtius robustus"), also known as the grey whale, gray back whale, Pacific gray whale, or California gray whale is a baleen whale that migrates between feeding and breeding grounds yearly. It reaches a length of , a weight of , and lives between 55 and 70 years. The common name of the whale comes from the gray patches and white mottling on its dark skin. Gray whales were once called devil fish because of their fighting behavior when hunted. The gray whale is the sole living species in the genus Eschrichtius, which in turn is
Coconut crab is classified in the family Coenobitidae, alongside one other genus, "Coenobita", which contains the terrestrial hermit crabs. Common names for the species include coconut crab, robber crab, and palm thief, which mirrors the animal's name in other European languages ("e.g." ). Coconut crab The coconut crab ("Birgus latro") is a species of terrestrial hermit crab, also known as the robber crab or palm thief. It is the largest land-living arthropod in the world, and is probably at the upper size limit for terrestrial animals with exoskeletons in recent times, with a weight up to . It can grow to up