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Salps feed mostly on phytoplankton, but sometimes they eat other zooplankton as well. In this close-up image of a salp fecal pellet you can see the microscopic shells of larval pteropods, which are planktonic snails that live in the open ocean. The spines are from another kind of zooplankton that has been broken up inside the salp’s gut. (Photo by Brennan Phillips, University of Connecticut)

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