Changing Planet

The World’s Fastest Swimmers, Past and Present

World's fastest swimmers infographic

How does a dolphin measure up to a penguin when it comes to speed in the water? And can Michael Phelps take either of them?

What about a squid or a sailfish?

This infographic from Backyard Ocean takes a fun look at some of those comparisons, as well as great moments in water-crossing history.

Which fact surprises you the most?

About the Blog

Researchers, conservationists, and others share stories, insights and ideas about Our Changing Planet, Wildlife & Wild Spaces, and The Human Journey. More than 50,000 comments have been added to 10,000 posts. Explore the list alongside to dive deeper into some of the most popular categories of the National Geographic Society’s conversation platform Voices.

Opinions are those of the blogger and/or the blogger’s organization, and not necessarily those of the National Geographic Society. Posters of blogs and comments are required to observe National Geographic’s community rules and other terms of service.

Voices director: David Braun (

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