Located in the center of the central disc on the underside. Greek Cultural & Modern Contexts
The groove on the underside (oral surface) of each arm containing the tube feet.
The Messier 38 star cluster is nicknamed the "Starfish Cluster," but is sometimes called the "π-Cluster" because its shape resembles the Greek letter Pi (π) .
The scientific class for sea stars, which literally translates to "star-like" in Greek.