Guilding's Sea Star

Overview

Guilding's Sea Star, often called the common comet star, is a widely distributed species found in tropical waters across the Pacific, Indian, and Atlantic Oceans, including the Caribbean. It is easily recognized by its small central disc and typically five long, cylindrical arms that maintain a consistent thickness toward their rounded tips.

Appearance

This sea star features a rough, granular surface covered in firm, low nodules. While often seen in shades of yellow or orange, its coloration is highly variable and can include beige, pink, brown, green, or even blue tones. Because of its frequent autotomy—the ability to shed limbs to escape predators—individuals may exhibit an irregular number of arms or arms of uneven lengths as they regenerate.

Distribution & Habitat

This species is circumtropical and inhabits a variety of marine environments, including coral reefs, rocky areas, and sandy or silty substrates. During the day, these sea stars typically remain hidden within reef crevices, emerging at night to forage.

Biology & Behavior

Guilding's Sea Star is notable for its capacity for both sexual and asexual reproduction. Asexual reproduction often occurs when a detached arm regenerates into a new individual; during this process, the isolated, growing arm resembles a comet, which is the source of its common name. They are generally omnivorous, feeding on filamentous algae, detritus, and organic debris.