Facelina auriculata is a captivating species of sea slug belonging to the family Facelinidae, within the class Gastropoda. This nudibranch is particularly notable for its elegant appearance and intricate coloration patterns.

In the waters of the Comunidad Valenciana, Facelina auriculata can often be spotted along the Mediterranean coast, making these stunning creatures a sought-after species for marine enthusiasts and divers exploring the region's rich underwater biodiversity.

• Appearance: Facelina auriculata is distinguished by its elongated, slender body and vibrant cerata, which are often adorned with hues of orange or reddish-brown. The cerata serve multiple functions, including respiration and defense, giving the nudibranch its unique, feathery appearance.
• Habitat: This species typically inhabits shallow coastal waters, thriving in rocky substrates and areas rich in algae. They are frequently observed in tidal pools and areas with abundant marine vegetation.
• Diet: Like many nudibranchs, Facelina auriculata is carnivorous, preying upon small marine organisms such as hydroids, which it grazes using its specialized radula.
• Behavior: Facelina auriculata is a relatively slow-moving creature, but its vivid coloration and graceful movements make it an enchanting subject for underwater photography and observation.

Due to its eye-catching appearance and ecological significance, Facelina auriculata is not only a jewel of the Mediterranean but also an important species for understanding marine ecosystems and biodiversity in the Comunidad Valenciana.