Mother and calf humpback whale, swimming side by side and underwater near the Kerama Islands in Okinawa. Mother and calf stay together for over a year until the calf is about 13 meters long. Fully grown males average 13 to 14 meters, and females 15 to 16 meters.
Humpback whale engaging in a tail slap (behavior where the creature slaps its tail fluke forcefully on the surface of the water).