Leopard Sea Cucumber

Overview

The Leopard Sea Cucumber is a large, distinctively marked echinoderm native to the tropical Western Indo-Pacific. It is frequently encountered by divers on coral reefs and sandy seabeds, where it slowly moves across the bottom to feed.

Appearance

This species has a firm, leathery, and roughly cylindrical body that can reach lengths of up to 60–70 cm. Its dorsal surface is typically greyish-brown or beige, adorned with numerous yellow or golden eyespots that are often circled in darker brown, resembling a leopard's coat. The underside is paler and features several rows of tube feet used for locomotion. Surrounding the mouth at the anterior end is a ring of 20 paddle-shaped, black feeding tentacles, often fringed with white.

Distribution & habitat

The Leopard Sea Cucumber is widely distributed throughout the tropical Indian and Pacific Oceans, ranging from East Africa and the Red Sea to Japan, Australia, and across to French Polynesia. It inhabits a variety of marine environments, including coral reef flats, lagoons, sandy slopes, and rubble areas, typically at depths between 2 and 40 meters.

Biology & behavior

When threatened or roughly handled, this sea cucumber can eject sticky, white, and toxic threads known as Cuvierian tubules from its anus to deter predators. These tubules are highly adhesive and can cause significant skin irritation to humans. While generally solitary, it is sometimes found hosting commensal organisms, such as small shrimp or parasitic pearlfish that may reside within its body cavity.