Flat tunicate GALLERYBotrylloides nigrum
The bright orange or red color of these Flat tunicate s makes them easy to spot. ( If you are looking closely for very small things)They grow almost anywhere, on turtle grass, on top of decorator crabs, under ledges, and amid algae covered rocks. Found at 2 feet and deeper.
On top of a tiny Decorator Crab (see the eye-stalks?)