How do Sponges Breathe?

If you are talking about SpongeBob SquarePants, he breaths through his mouth. But, I have a feeling you are NOT asking about SpongeBob.Sponges that live in the sea (not in pineapples) breath oxygen just like humans only they get it from sea water. The water flows through the mesohyl, or inner tissues, and is absorbed.Actually if you watch SpongeBob you do see that he is sucking in water when he breaths. Hmmm