海樽属是海洋性浮游动物，尾索动物亚门海樽纲。有性生殖或出芽生殖，多为单体。身体形状因种类而有不同，一般呈桶状，由于肌带有节奏地从前到后伸缩，使身体产生运动，同时也使水进出循环，而进行呼吸和摄取食物。
但这种富含碳而且容易下沉的海樽纲的发现有可能改变这一假设。
But the discovery of just how carbon-rich and prone to sinking thaliaceans are may change that assumption.
然而，正如勒布拉图先生和琼斯博士在《湖沼学和海洋学》中载文报告，当他们分析海樽纲身体组织时发现，这种动物的碳含量占体重的三分之一。
However, as Mr Lebrato and Dr Jones report in Limnology and Oceanography, when they analysed thaliacean tissues they found that the creatures were one-third carbon by weight.
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