ナショナルジオグラフィックさんのインスタグラム写真 - (ナショナルジオグラフィックInstagram)「Photo by @BrianSkerry. Champion free diver Ai Futaki swims below a pod of spinner dolphins in the offshore waters of Hawaii. Spinner dolphins are among the most social of all dolphin species, and are rarely seen alone or in small groups. These creatures typically feed in deep waters offshore at night, then move into shallow, coastal bays during the day to socialize and rest. The name of these dolphins is derived from the acrobatic jumps and spins that they make, often leaping high out of the water. After humans, dolphins have the largest brains in the animal kingdom, relative to body size. Through the games that they play with one another and through the means by which these dolphins socialize, researchers are able to measure their cognitive abilities. In fact, dolphins have been described as ‘an alien intelligence on Earth.’ In the years ahead, perhaps we will unlock the answers to the mysteries surrounding the complex lives of these animals, maybe even learning to communicate with one another at some point. To see more underwater photography, and to learn more about my adventures as a National Geographic photographer, follow me - @BrianSkerry - on Instagram. #spinner #dolphin #dolphins #ocean #underwater #photography #nationalgeographic #natgeo #travel #hawaii #oahu #water #tropical #animals #photooftheday #onassignment」1月20日 8時30分