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Facts, figures & video

Whales and dolphins are amazing. Find out incredible facts about their lives under the sea.

Which is the biggest whale? The smallest dolphin? How far do whales migrate? Which whale makes the loudest sound? Do they sleep? Just some of the questions you will find answers to along with many others.

A life under the sea

Blue whale © Andrew Sutton

Facts about whales

Find out about the lives of the largest creatures living on the planet. Learn about whale migrations, the different types of whales and who has the biggest brain.

Spotted dolphins

Facts about dolphins and porpoises

Dolphins and porpoises come in all different sizes. From the magnificent orca to the tiny vaquita, dive into their world and learn more.

Male orca

Facts about orcas

Find out some amazing facts about orcas, the largest member of the dolphin family. There incredible creatures have evolved to inhabit every ocean, from the poles to the tropics.

Breaching North Atlantic right whale


Which whale is the heaviest? Which one dives the deepest? The longest migration?  Whales and dolphins hold some amazing records. Dive in and find out more and these incredible creatures.

Your favourite questions about whales and dolphins...

Why do whale and dolphin tails go up and down?

Blue whale at surface

Which is the largest whale species?

Indo-Pacific humpback dolphin

Where do dolphins live?

What is baleen?


What is an orca pod?

Record breakers

Longest baleen
belongs to a bowhead whale
Loudest sound
made by a sperm whale
Fastest baleen whale
achieved by a fin whale
Deepest dive
by a Cuvier's beaked whale
The longest tooth
belongs to a narwhal
Longest recorded journey
made by a gray whale

Videos from the wild

A selection of our favourite videos from the WDC archives. You can watch more on our YouTube channel.

False killer whales

Risso’s dolphins

Spotted dolphins

Help protect whales and dolphins and their homes

By adopting a dolphin or by making a donation, you can help us save these amazing creatures.

Indo-Pacific bottlenose dolphin © Mike Bossley/WDC


Adopt a dolphin and follow the lives of these amazing creatures.

Humpback whale


Your gifts help us take action to protect their homes.