Codium Mamelonné

Overview

Codium coralloides is a green alga endemic to the Mediterranean Sea. It typically grows as an encrusting, mamelonated cushion on rocky substrates, displaying a characteristic shiny, dark green appearance.

Distribution & habitat

This species is found throughout the Mediterranean, including coastal areas of Spain, France, Italy, Greece, and Turkey. It inhabits rocky environments within the lower infralittoral and circalittoral zones, often observed throughout the year.

Appearance

This alga forms cushions that measure approximately 10 to 20 cm in width and 1 to 3 cm in thickness. While it attaches to rocks at a few points on its underside, it is relatively easy to detach. Its texture is somewhat loose, making it prone to fragmentation. The surface has the soft, downy look typical of the Codium genus.

Biology & behavior

Like other green algae, Codium coralloides produces energy through photosynthesis, requiring adequate light to thrive. Its reproduction is a sexual process involving specialized organs called gametocysts, which develop on the utricules. These organs release male and female gametes into the water column, where they fuse to form a zygote that eventually develops into a new individual.