ナショナルジオグラフィックのインスタグラム(natgeo) - 2月9日 06時07分

Photo by @BrianSkerry.

A Bottlenose Dolphin swims with Spotted Dolphins in The Bahamas. After humans, dolphins have the largest brains in the animal kingdom, relative to body size. Despite this fact, their world is very different than our own and the ways in which they use their brain is fascinating. Dolphins see much of their world acoustically, using echolocation (i.e. sonar) to determine the location of objects and distances. Dolphins also sleep with one half of their brains awake, as they need to be constantly alert for predators and because they are voluntary breathers.

To learn more about these amazing underwater creatures, and to see more underwater photography, follow me, @BrianSkerry, on Instagram.
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