What are the main sources of nutrients for a sponge?

Sponges primarily obtain nutrients through filter feeding, drawing in water through their porous bodies. They capture microscopic particles such as bacteria, plankton, and organic detritus using specialized cells called choanocytes, which have flagella that create water currents. Additionally, sponges can absorb dissolved organic matter directly from the surrounding water. This combination of filter feeding and absorption allows sponges to thrive in various aquatic environments.