filter-feeder

filter feeder

noun
an aquatic animal that feeds on particles or small organisms strained out of water by circulating them through its system: includes most of the stationary feeders, as clams, oysters, barnacles, corals, sea squirts, and sponges.

Origin:
1925–30

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
filter feeder  
An aquatic animal, such as a clam or sponge, that feeds by filtering tiny organisms or fine particles of organic material from currents of water that pass through it.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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