他们包括平均寿命只有11.6天的桡脚类的动物（一种小的甲壳类动物）非洲的汤氏纺锤水蚤，和可以存活74年的珍珠胎贝(珠母贝)。
They included cold-blooded organisms that ranged in average lifespan from 11.6 days for the copepod (small crustaceans) Arcartia tonsa to 74 years for the pearl mussel (Margaritifera margaritifera).
哲水蚤小海生动物，如哲水蚤属的甲壳类动物，是露脊鲸食物的主要来源。
Minute Marine organisms, such as crustaceans of the genus Calanus, that are a major source of food for right whales.
鳃足动物一种鳃足亚纲水生甲壳类动物，如神仙虾和水蚤，特征是身体分节，具有平直叶状。
Any of various aquatic crustaceans of the subclass Branchiopoda, such as the fairy shrimp and water flea, characterized by a segmented body and flattened, leaflike thoracic appendages.
“水蚤”不是昆虫而属于桡足类，是一种象龙虾和蟹一样的甲壳类动物，但极其微小。
"Water fleas" are not insects but copepods, a crustacean like lobsters and crabs but extremely small.
“水蚤”不是昆虫而属于桡足类，是一种象龙虾和蟹一样的甲壳类动物，但极其微小。
"Water fleas" are not insects but copepods, a crustacean like lobsters and crabs but extremely small.
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