: Most sea stars exhibit a distinctive starlike shape with five arms arranged around a central disc. However, some species can have up to 50 arms .
: Most species can regenerate lost arms; in some cases, a single separated arm can grow into a new sea star if part of the central ring nerve canal is attached. Ecological & Human Impact asteroidea
: Like all echinoderms, asteroids possess a unique network of internal channels used for locomotion, feeding, and basic circulatory functions. : Most sea stars exhibit a distinctive starlike