Blue-gray coloration mottled with light gray. Long and streamlined bodies; small dorsal fins; long and thin pectoral flippers.
Known to display a range of behaviors: breaching, blowing, pectoral flipper slapping, tail slapping, spy hopping, head slapping, "peduncle throw," and "peduncle arch." They fluke often because they have to dive so deep.
Found in every ocean across the world.
Humans and occasionally orcas
The population off the California coast, migrates to Mexico and Costa Rica. Has summer/winter migration patterns in most areas of the world. In California, they spend the summers feeding in Monterey Bay, the Channel Islands, and the Farallon Islands,
Social system/Group size
Travel individually or in small groups.
Vessel strikes and fisheries. Possibly noise pollution, resource competition, habitat degradation, and vessel disturbance. Whaling used to be a problem.
Aerial surveys in Australia are performed to show blue whale habitat and distribution. They are used to to investigate habitat choice for krill and photo-IDing of whales.
Largest animal in the world, has the heart the size of a small car.