They use their unique beaks to filter the algae.

他们利用自己的独特喙过滤藻类。

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All these features indicate that the organism should be a kind of lower class animal of filter feeder with certain affinity to Archaeocyathids but should not be classified into algae.

表明应是一种较低级的滤食性动物，可能与古杯动物有一定亲缘关系，不应将其归属藻类。

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The results indicate that the predominant organism groups were a complicated ecosystem including bacteria, protozoa and algae in the biotrickling filter while it was only fungi in the biofilter.

结果表明：生物滴滤池中形成了由细菌、藻类及原生动物组成的复杂生态系统，而生物过滤池中真菌为优势微生物。

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Some algae cells are also easier to filter than others, reducing the energy and economic cost of "harvesting" the algae from cultures.

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