Right whales are large marine mammals belonging to the family Balaenidae. They are known for their distinctive callosities, which are rough patches of skin that often host barnacles. There are three species of right whales: the North Atlantic right whale, the North Pacific right whale, and the Southern right whale. These whales are typically slow-moving and can grow up to 60 feet long. Right whales primarily feed on small zooplankton, using their baleen plates to filter food from the water. They are considered one of the most endangered whale species, with the North Atlantic right whale population particularly at risk, facing threats from ship strikes and fishing gear entanglements.