Wikipedia Reference Information
Right whales are baleen whales belonging to the family Balaenidae. Three right whale species are recognized in the genus Eubalaena, while the Bowhead Whale—also a right whale—is placed in its own genus, Balaena.
Right whales can grow up to 18 m (60 feet) long and weigh up to 100 tonnes. Their rotund bodies are mostly black, with distinctive callosities (roughened patches of skin) on their heads. They are called "right whales" because whalers thought the whales were the "right" ones to hunt, as they float when killed and often swim within sight of the shore. Populations were vastly reduced by intensive harvesting during the active years of the whaling industry. Today, instead of hunting them, people often watch these acrobatic whales for pleasure.
The four right whale species live in distinct locations: around 300 North Atlantic Right Whales live in the North Atlantic; approximately 200 North Pacific Right Whales live in the North Pacific; about 7,500 Southern Right Whales are spread throughout the southern part of the Southern Hemisphere; and 8,000–9,200 Bowhead Whales are distributed entirely in the Arctic Ocean.
The complete, up-to-date and editable article about Right Whale can be found at Wikipedia: Right Whale