Why Are The Sponges Called Filter Feeders?
Why Are The Sponges Called Filter Feeders? Sponges (Poriferans) receive (incoming) food particles with the help of collar cells (choanocytes). These collar cells or choanocytes are surrounded by microvilli which filter the incoming food particles. Therefore, sponges/Poriferans are called filter feeders. Are sponges filter feeders or suspension feeders? Suspension-feeders, like barnacles, anemones and featherstars, use