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cetaceans

 

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The cetaceans are whales, dolphins and porpoises. The word cetacean is derived from the greek word "ketos" meaning sea monster. Whales and especially dolphins are well known for their intelligence and for thier often complex social behaviors.

Amazon River Dolphin

Amazon Dolphin

Also referred to as the Boto, this creature is the largest and most widely distributed river dolphin in the world.

Bottlenose Dolphin

Bottlenose Dolphin

A playful animal, bottlenoses are often spotted bow-riding, wake-riding and body-surfing across the surface.

Killer Whale

Orca / Killer Whale

The killer while is easily recognized by its distinctive black and white color pattern and size, males growing up to 30 feet.

Yangtze River Dolphin

Yangtze River Dolphin

In 2006 the Baiji, or Yangtze River Dolphin was declared extinct by an organization devoted to its conservation.

 

Nature picture credits (top to bottom): Photo © Hiroya MinaKuchi / Minden Pictures (Amazon River Dolphin); Photo © Martin Purmensky (Bottlenose Dolphin); Photo © Photographer (Orca); WWF / Chinese Academy of Science (Yangtze River Dolphin).