Cetaceans include whales, dolphins and porpoise. There are two types of Cetaceans. Those with teeth are called Odontocetes like killer whales and dolphins and those without teeth are called Mysticetes or baleen whales including the great whales such as right, bowhead, blue, fin, humpback and grey. Individual whales are identified by unique patterns on the underside of their flukes or tails, like a thumb print. This is how animals were tracked to determine their primary migration routes.
Scientists continue to use fluke patterns to study behavior.
Color on the underside of tails varies from all black to all white. Age - Humpbacks live to be between 40 and 60 yrs old. Inexact science determined by waxy ear plugs with lines representing seasons or years, like a cross section of tree trunk. Baleen plates in the mouth also show similar lineage. Calving is every 2 -4 years.