Which behavior distinguishes a true bottom feeder from Alaska Pollock, according to ecological description?

Answer

Consuming detritus, mud, or organisms in the sediment layer

A true bottom feeder consumes material that lives in or directly on the sediment layer, whereas Alaska Pollock are active predators hunting suspended organisms in the water mass.

Which behavior distinguishes a true bottom feeder from Alaska Pollock, according to ecological description?
habitatfishfeedingPollock