It's a defense mechanism of the Christmas tree worm, most of which resides in a tunnel it carves into live coral.
这是圣诞树蠕虫的防御机制,它们中的大多数栖身在活珊瑚上挖出的“地道”里。
It's a defense mechanism of the Christmas tree worm, most of which resides in a tunnel it carves into live coral.
这是圣诞树蠕虫的防御机制,它们中的大多数栖身在活珊瑚上挖出的“地道”里。
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