Figure 30.5: Two Suspension Feeders (A) A toothless grey whale showing the array of plates in its mouth. The plates, made of a fingernail-like material, are called baleen, and the toothless whales are often called baleen whales. (B) Mussels (a type of mollusk) feed by pumping environmental water over and through their gills, which remove tiny food particles from the water.