Shetland Aldisa, scientifically known as Aldisa zetlandica, is a fascinating species of nudibranch, a type of sea slug, belonging to the Cadlinidae family. These striking creatures are known for their vibrant colors and unique feeding habits, making them an intriguing subject of study for marine biologists and enthusiasts alike.
Description & Characteristics
Aldisa zetlandica, also referred to as the Shetland Aldisa, exhibits a slender, elongated body, typically reaching a maximum size of 50 mm in length. It possesses a distinctive color pattern, characterized by a white or cream-colored body adorned with numerous reddish-brown blotches. Its rhinophores, which are sensory organs used for detecting food and the surrounding environment, are club-shaped and feature distinctive lamellae, which are thin, flattened structures that increase their surface area.
Habitat and Occurrence
Shetland Aldisa thrives in sponge areas, particularly in the colder waters of the North Atlantic Ocean. This species has been observed in both the northeastern Atlantic and the Mediterranean Sea. Aldisa zetlandica typically inhabits depths ranging from the intertidal zone to depths of around 100 meters, making it a prevalent presence in a variety of marine ecosystems.
Taxonomy
Aldisa zetlandica belongs to the Class: Gastropoda, Order: Nudibranchia, and Family: Cadlinidae. This classification places it within a diverse group of marine molluscs known for their striking beauty and ecological significance. The family Cadlinidae, to which Aldisa zetlandica belongs, is characterized by its members’ distinct feeding habits and morphological features.
Feeding
Shetland Aldisa is a specialist feeder, relying solely on sponges for sustenance. This dietary preference has led to the development of adaptations that allow it to efficiently extract nutrients from its sponge prey. Its radula, a ribbon-like structure in the mouth equipped with teeth, is specifically designed to scrape and ingest sponge tissue.
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