The Pyura chilensis. Known as the living “rock,” in the class of Ascidiacea, or filter feeders.

This animal is immobile, filters water and eats the microorganisms in it, has clear blood containing the rare element vanadium, is born male and grows female sex organs during maturity, and reproduced by squirting out its sperm and eggs into the water where they hopefully fertilize. Also, it is known as a delicacy in Chile and tastes somewhat like soap, but due to vanadium being a heavy metal, may cause liver damage if someone eats too much.