写真

this is a Beluga Whale in the Vancouver aquarium:

Beluga's:

"Beluga whale are a small, toothed whale that is white when becomes an adult. The beluga's body is stout and has a small, blunt head with a small beak, tiny eyes, thick layers of blubber, and a rounded melon. They have one blowhole. Beluga means "white one" in Russian. Its genus, Delphinapterus, means "whale without fins", and the species, leucas, means white. The beluga is also called the white whale, the white porpoise, the sea canary (because of its songs), and the squid hound (due to its diet). Unlike most other cetaceans, the beluga's seven neck vertebrae are not fused, giving it a flexible, well-defined neck."

They grow to 15 feet and weight 3,000 pounds, females are shorter than males. They have 34 teeth aprox.
"Belugas usually dive for about 3-15 minutes while hunting for food. They can travel for about 1.5 miles (2.5 km) during a dive and commonly dive to a depth of 66 feet (20 m) to hunt. They can dive to a depth of about 1,300-2,100 feet (400-650 m) at times" "Beluga are relatively slow swimmers. They swim about 2-6 mph (3 to 9 kph) . They are capable of short bursts of speed up to 14 mph (22 kph) for about 15 minutes."