Right whales are 40 to 50 feet long with a large head that can be one-third the length of the body. Their skin is generally all black, though some have white patterns on their bellies and frequently bear white scars from entanglements in fishing gear. They have distinctive white or yellowish callosity patches on their heads.
Right whales are easily distinguished from other whales by several features:
- No dorsal fin - Unlike most whales, right whales have no fin on their broad, flat back.
- Callosities on their heads
- V-Shaped blow
- Distinctive tail
Illustration Daniela Weil, http://www.simpledifference.com/.