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Giant sea star : ウィキペディア英語版 | Giant sea star
The giant sea star, ''Pisaster giganteus'' is a species of sea star that lives along the western coast of North America from Southern California to British Columbia. It makes its home on rocky shores near the low tide mark. It preys on mollusks. It can grow as large as in diameter. Its color varies from brown to red or purple. ==Reproduction and regeneration== Giant sea stars have small eggs, and their sperm contain spherical heads. Once their larvae are born, they are bilaterally symmetrical. By the time they mature and reach adulthood they are centered on a set point with radial symmetry to their bodies. The gonads of the giant sea star grow in a winters time just in time for spawning season between the months of March and April.〔(【引用サイトリンク】url=http://biology.fullerton.edu/biol317/Murray/Fall97/sea_stars.html )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Giant sea star」の詳細全文を読む
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