Yellow Gorgonian

Overview

The Yellow Gorgonian (Eunicella cavolini) is a colonial soft coral widely distributed throughout the Mediterranean Sea. It is recognized as an important ecosystem engineer, as its complex, fan-shaped structure provides essential habitat and increases biodiversity for various marine organisms.

Appearance

This species forms arborescent, fan-shaped colonies that typically reach heights of up to 50 cm. Its structure consists of smooth, cylindrical branches that generally grow in a single plane, often oriented perpendicular to water currents to optimize prey capture. The colony is covered by a yellowish-orange fleshy layer known as the coenenchyme, while the polyps—arranged in four rows—are typically white or yellow.

Distribution & habitat

Eunicella cavolini is common in the Mediterranean Sea, where it prefers rocky substrates. While it is frequently found at depths between 10 and 30 meters, it can inhabit deeper waters, extending down to 150 meters. It thrives in areas with good lighting and is often found in environments ranging from steep walls to boulder fields.

Biology & behavior

As a sessile suspension feeder, the Yellow Gorgonian extends its polyps to capture zooplankton from the water column. It is a slow-growing species, typically adding only 1 to 2 cm to its height each year. Reproduction occurs during the summer, involving the release of sperm into the water to fertilize eggs within the polyps of other colonies. The resulting larvae drift as plankton before settling on a suitable surface to begin a new colony. The species is currently considered Near Threatened, as it is sensitive to rising water temperatures and human-related disturbances.