Recent work on selectivity in deposit feeders has focused on the importance of particle size. In field experiments with exotic sediments of known characteristics (glass beads), we demonstrate that selective ingestion in a multitentaculate, surface deposit feeding ampharetid polychaete depends upon particle specific gravities and surface textures. The degree of selectivity for specific gravity is shown to be dependent upon worm size....
Self, Robert F., and Peter A. Jumars. 1978. "New resource axes for deposit feeders?." Journal of Marine Research 36, (4). https://elischolar.library.yale.edu/journal_of_marine_research/1448