These whales migration routes are based on water temperature. The whales start the summer in the cool waters where their is an abundance of krill. They then move to the warmer waters for winter where they can mate and breed. "They are fast, strong swimmers, capable of reaching 30 mph (48.3 km/hr) when alarmed, but they usually cruise along at about 12 mph (19.3 km/hr)." These fast swimmers most often travel in pairs, although they are sometimes seen in small groups or by themselves.
