Choanozoan and picozoan marine protists are probably virus eaters: study

Viruses occur in astronomic numbers everywhere on Earth, from the atmosphere to the deepest ocean. Surprisingly, considering the abundance and nutrient-richness of viruses, no organisms are known to use them as food. In Frontiers in Microbiology, researchers publish the first compelling evidence that two groups of ecologically important marine protists, choanozoans and picozoans, are virus eaters, catching their "prey" through phagocytosis (i.e. engulfing).

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