Sponge cells are specialized cells found in sponges, which are simple aquatic animals. These cells play a crucial role in the sponge's ability to filter water and obtain nutrients. They help create water currents through tiny openings, allowing the sponge to draw in food particles and oxygen while expelling waste. There are different types of sponge cells, including choanocytes, which have flagella that help move water, and amoebocytes, which transport nutrients and aid in reproduction. Together, these cells enable sponges to thrive in various marine environments, showcasing their unique adaptations to life in water.