Sea Creature that looks exactly like a rock with guts.
Pyura chilensis is a creature that not only looks like a rock, but is also completely immobile like one too. It eats by sucking in water and filtering out micro-organisms. Its blood also produces a rare element called vanadium.
It is born male, but becomes hermaphroditic at puberty. It also eproduces by tossing clouds of sperm and eggs into the surrounding water and hoping they knock together.
Another fun fact about this creature is that it is consumed. Locals of Chile or Peru (thats where it is found) eat it raw or in stews. They say it tastes “soapy” and "bitter"
Yet another fun fact. This creature is a tunicate, which means it’s in the phylum chordata, which means, it’s related to animals with back bones. Tunicates are thought to be at the base of the evolutionary branch that lead to whales, tigers, crocodiles, eagles, and humans.
Yes, millions of years ago, your ancestor could have quite possibly looked like a rock with guts.