The Portuguese Man o’ War is not one animal, but is actually comprised of colonies of invertebrate, jelly-like marine animals of the family: Physaliidae glomming together. These pelagic hydroids (or hydrozoans) colonize and are infamous for their very painful, powerful sting.
The Venus flytrap sea anemone is a large sea anemone resembling a Venus Flytrap. Like it’s plant namesake, it is believed to close its tentacles to capture prey or to protect itself. It is found in and around the Gulf of Mexico.