Holothuria Mammata

Overview

Holothuria mammata is a sea cucumber species found in the Mediterranean Sea and the temperate northeastern Atlantic. It is highly valued commercially and is a primary target for fisheries in these regions, often sharing habitats with the closely related and visually similar Holothuria tubulosa.

Distribution & habitat

This species inhabits temperate waters across the Mediterranean and the northeastern Atlantic, including areas around the Azores and Canary Islands. It typically occupies sandy zones or seagrass beds and is often found in reef environments. While it has a patchy distribution, it prefers areas that offer environmental stability and shelter, which are particularly important for smaller, more vulnerable individuals.

Appearance

This sea cucumber has a cylindrical body that is slightly flattened on its ventral side. Its dorsal surface is characterized by large, mammillate papillae arranged in six irregular longitudinal rows. It features a collar of small oral papillae surrounding its mouth. Distinguishing this species from the common Holothuria tubulosa can be challenging due to high morphological variability, but H. mammata is generally identified by the presence of Cuvierian tubules and relatively larger dorsal papillae.

Biology & behavior

Holothuria mammata is a nocturnal species that is not highly mobile. Its reproductive cycle is closely linked to environmental factors, with gonad development typically beginning during periods of shorter photoperiods and lower water temperatures. Spawning generally occurs later as day length increases and water temperatures rise above 15°C. Like many other sea cucumbers, it plays an ecological role as a deposit feeder, primarily consuming organic refuse from the seafloor.