Depending on the sponge, food is obtained through filtering water for nutrient-rich particles or snaring small sea creatures with specially adapted arms. Most sponges are detritivorous, consuming debris particles and mic... More »

Sponges continually pump water through the ostea into an internal system of canals and expel it from the osculum, trapping food and removing oxygen from the water. They use collar cells in these canals to flip flagella, ... More »

Sponges filter food particles out of the water by forcing the water through their porous bodies with a self-generated miniature current, which brings particles within reach of the walls of their pores where cells absorb ... More »

Digestion in porifera, or sponges, occurs in individual cells, which envelop and break down food particles. Sponges lack tissues, organs and organ systems, so they don't have the same digestive systems as more complex an... More »

According to A-Z animals, barnacles are primarily filter feeders that collect microscopic particles of food from the water column. These food particles can be comprised of plankton or bits of organic debris. More » Pets & Animals Marine Life

Oysters eat plankton, algae and small food particles that wash over their gills. Both oysters and clams use the same type of siphoning and straining system to remove food from the water around them. More »

Most bivalves absorb nutrition by filter feeding, which involves drawing particles of food into their gills through their mouths and into their stomachs. Some bivalves trap food with mucus-covered tentacles. Others are c... More »