Both of the major vessels, especially the upper one, can pump blood by contracting.365 gambling TOP RATED GAMBLING APPS Tentaculate Surface Deposit Feeders Tentaculate Subsurface Deposit Feeders Swallow sediment non-selectively: digestively selective. Figure Deposit and filter-feeding in polychaetes. A, Arenicola species (Arenicolidae), a non-selective deposit-feeder, in its burrow. Arrows indicate direction. These data suggest that some bulk deposit feeders skim the surface of the sea bottom or types of particles; others are non-selective, feeding instead on bulk.