Imagine a blob that looks like a squishy, underwater booger. It sits around all day, waving its little openings like it's trying to catch snacks floating by, but really, it’s just sipping water. Once it's done with its lazy life, it decides to stop moving and becomes a fixed couch potato of the ocean. Oh, and it has the brain power of a rock, because it just doesn’t need one after a while. Just remember, it's not a squid, it's not a fish, and definitely doesn't squirt like a water gun!