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Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (/ ˌ æ s t ə ˈ r ɔɪ d i ə /). Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish
海星，如赭色海星（ Pisaster ochraceus ）和 珊瑚礁海星 （ 英語 ： Reef starfish ） （ Stichaster australis ），已被廣泛稱作在生態學中關鍵種概念的例子。 熱帶 的 棘冠海星 （ Acanthaster planci ）是 珊瑚 的一個貪婪的捕食者，遍布 印度洋-太平洋海域 。
Discover the amazing abilities of a familiar sea creature. Learn how a starfish survives with no brain.
2020年2月4日 · Starfish (or sea stars) are beautiful marine animals found in a variety of colors, shapes, and sizes. All starfish resemble stars, and though the most common have only five arms, some of these animals can grow up to 40 arms. The amazing sea creatures—part of
2009年11月12日 · 1 of 10. Sunflower Sea Star A sunflower sea star is draped moplike over a seafloor rock off the British Columbia coast. Though commonly called starfish, sea stars are not fish but echinoderms ...
You probably know sea stars as starfish, the name sea stars are commonly known by. But sea stars aren’t really fish. Sea stars, like sea urchins and sand dollars, do not have backbones, which makes them part of a group called invertebrates. Fish have backbones, which makes them vertebrates. Got it? Most sea stars sport spiny skin and five arms, although some can grow as many as 50 arms. The ...
starfish, or sea star, Any of 1,800 echinoderm species (class Asteroidea) that have regenerable arms surrounding an indistinct disk and that inhabit all oceans. Species range from 0.4 to 25 in. (1–65 cm) across, but most are 8–12 in. (20–30 cm) across.
