Gastropods

Felimare villafranca – Villefranche nudibranch

Description

Felimare villafranca is a colorful sea slug belonging to the Chromodorididae family. It is known for its vibrant blue coloration, often with yellow or white patterns on its body. The species was first described by Risso in 1818 and is one of the most well-known and widely distributed chromodorid nudibranchs in the Mediterranean.

Diet

Felimare villafranca feeds on sponges (Porifera), which are its primary food source. Like many chromodoridids, it also absorbs secondary metabolites from the sponges, which help it defend against predators.

Lifestyle

• Habitat: It inhabits rocky coastal areas and is widespread in the Mediterranean Sea, as well as along the Atlantic coasts (e.g., Brittany and Morocco). It is also found on the Iberian Peninsula and the Balearic Islands.
• Reproduction: Like all chromodoridids, it is a hermaphrodite and engages in mutual mating.
• Activity: It is diurnal and moves slowly across the seafloor in search of food.

Fun Facts

• Synonyms: Felimare villafranca was previously known by names such as Hypselodoris villafranca, Doris villafranca, and Chromodoris coerulea.
• Distribution: It is one of the most common and well-studied species of chromodorid nudibranchs in the Mediterranean.
• Color Variations: Its color can vary depending on location and diet, but the blue base color remains typical.
• In Felimare villafranca, the color patterns can become more complex and branched as the animal ages—a fascinating example of the adaptability of these sea slugs. Young individuals often display simple stripes, while mature specimens develop intricate, web-like, or highly structured patterns.