Aeolidia filomenae

Aeolidia filomenae is a distinct species of aeolid nudibranch, easily recognized by its numerous flattened, hooked cerata that adorn its body. A characteristic feature is a triangular area extending from the rhinophores to the mid dorsum, often accompanied by a subtle white Y-shaped mark on the head, though this may be difficult to discern in lighter-colored individuals. This nudibranch is found along the Atlantic coasts of the British Isles and Europe, specifically from Scotland down to Portugal, thriving in coastal waters. Typically residing in depths shallower than 40 meters, with most occurrences recorded at depths around 20 meters or less, Aeolidia filomenae prefers habitats that provide ample opportunity for grazing. Its diet primarily consists of small invertebrates, which it consumes while crawling along the substrate in search of food. This species is known for its solitary behavior, often seen moving slowly across rocky reefs or sandy bottoms. Encounters with Aeolidia filomenae during dives can be intriguing, as divers may observe its unique cerata and feeding habits. The nudibranch's coloration and shape can make it blend into its surroundings, requiring keen eyes to spot it. The conservation status of this species is not evaluated, indicating it may not currently face significant threats.