Turtle grass - Kamekusa

...The deck is arranged like paving stones. They live in calm waters near the coast where seaweed, such as eelgrass, which is their main food, grows thickly. During the breeding season, they migrate in groups from their feeding areas to their spawning grounds. According to research in the Atlantic Ocean, they are known to travel to and from islands more than 2,000 km away.

*Some of the terminology that refers to "turtle grass" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…甲板は敷石状に並ぶ。カメ草と呼ばれ主食となるアマモなどの海草が繁茂する海岸近くの穏やかな海にすみ，繁殖期には採食海域から産卵地まで群れをなして大移動する。大西洋での調査によれば，2000km以上も離れた島まで往復することも知られている。…

※「カメ草」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報