Radial symmetry occurs in ___________.

Radial symmetry occurs in Asterias starfish.

Bilateral symmetry is the ability of the body to split into two identical halves in just one plane. It is seen in snails, anopheles, and cockroaches. On the other hand, radial symmetry is the ability of the body to divide in identical parts as the parts are arranged in circular fashion around the central axis. Only a very limited subset of species, such as some sponges and marine creatures, have radial symmetry. Asterias starfish have a body structure like a star and are classified as star-like echinoderms.
Because starfish are also known as asteroids, it is because these echinoderms are members of the Asteroidea class. Starfish with a central disc and five arms shaped like stars. They possess the capacity to restore lost or injured arms.

Hence the correct answer is option C.