Why sycon called filter feeder?

Sycon, a type of marine sponge, is called a filter feeder because it obtains nutrients by filtering small particles, such as bacteria and plankton, from the water. Water enters the sponge through tiny pores, passes through a series of canals lined with specialized cells called choanocytes, which trap and ingest food particles, and then exits through a larger opening. This efficient filtering process allows sycon to thrive in its aquatic environment by extracting essential nutrients while also helping to maintain water quality.