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小知識
紅棘海星Protoreaster lincki,分布于印度洋熱帶淺海。體形較大,直徑可達30厘米。體表的紅色棘狀突起有防御作用。以珊瑚、海綿、蛤蜊等小動物為食。捕食時,胃翻出包裹獵物;分泌消化液消化獵物后,再收回體內。
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紅棘海星 / Adrian Pingstone, Public domain
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紅棘海星/ André ALLIOT, Public domain
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