Compare and contrast the feeding habits of sponges and cnidarians.
Sponges feed by filtering food particles from the surrounding water. Specialized feeding cells inside the sponge extract microorganisms and organic matter from the water. Sponges also have other specialized cells that perform digestion, nutrient transport, and waste removal. Cnidarians capture food using the stinging cells in their tentacles. They use these stinging cells to stun their prey, then use their tentacles to transport the food to their mouths. Cnidarians differ from sponges because they have a body cavity where digestion occurs.