Given impressive-sounding names like "Portuguese man-of-war," jellyfish are certainly respected and feared by humans. Not exactly a fish, and lacking a spine, this creature has a single body cavity or mouth. Any food consumed passes through this opening, and so do undigested remains being expelled.

拥有“葡萄牙军舰”这个听起来就让人印象深刻的名字，水母的确让人类又敬又怕。这种生物既非鱼类，又缺少脊椎，它只有一个体腔，或者也可称之为嘴巴。任何被摄取的食物都要经过这个开口，没有被消化的残骸也是由此排出。

(短文节选,本期开始连载：海中“刺”客──水母)