One of biggest red algae, Dilsea carnosa are tought and have a leathery texture. From a single disc shaped branching, several flat blades expand, with a dark redish/brown color, sometimes having little holes. Those blades have a short cylindrical stripes, and do not have veins or midrib and are spoon wedge or spoon shaped. Older blade may be split from a margin towards the base. The disc is continuously  produces new blades, allowing it to persist for many years.