White Gorgonian

Overview

The white gorgonian is a colonial soft coral native to the Mediterranean Sea and the Adriatic Sea. It typically forms upright, branching structures that can reach up to 70 cm in height, often creating dense colonies on the seafloor.

Appearance

This species is characterized by its white, fleshy coenenchyme that covers a skeletal axis. It features relatively long, nearly parallel branches that grow vertically rather than in a single plane. The polyps, which are translucent and tinted with yellowish-brown or olive hues, are fully retractable and emerge from small, often indistinct calyces along the branches.

Distribution & habitat

Found primarily in the western Mediterranean and Adriatic, the white gorgonian thrives on rocky, sandy, or muddy substrates. It is a photophilic species, meaning it prefers well-lit environments and is commonly found at depths between 10 and 60 meters. It is frequently observed on gently sloping surfaces, including pebbles and shells, and can sometimes colonize areas impacted by environmental stress or trawling.

Biology & behavior

The white gorgonian hosts symbiotic zooxanthellae—microscopic algae—within its tissues, which contribute to the brownish coloration of its polyps. It is a slow-growing organism, with an annual growth rate typically ranging from 1.5 to 4.5 cm. The colony serves as an important habitat for various marine life, including small nudibranchs that may feed on its polyps or use the structure as a substrate for their eggs.