Armina occulta, commonly known as the “Armina occulta,” is a species of nudibranch, a type of sea slug. These fascinating creatures are known for their vibrant colors and unique body shapes, making them a captivating sight for marine enthusiasts.
Description & Characteristics
Armina occulta is a relatively large nudibranch, reaching a maximum size of approximately 80 millimeters (3.1 inches). It possesses a distinct, elongated body with a prominent dorsal hump. The coloration of Armina occulta can vary, but it typically exhibits a combination of vibrant colors, often including shades of orange, yellow, and red, along with white patches. This striking color pattern serves as a warning signal to potential predators, indicating its toxicity.
Habitat and Occurrence
Armina occulta is primarily found in the coastal waters of the eastern Pacific Ocean. This nudibranch is commonly encountered in intertidal and subtidal zones, ranging from the surface to depths of around 20 meters (65 feet). Its habitat preferences include rocky shores, kelp forests, and coral reefs, where it actively forages for its prey. Armina occulta is typically found in the neritic zone, which is the shallowest part of the ocean that extends from the shoreline to the edge of the continental shelf.
Taxonomy
Armina occulta is classified within the phylum Mollusca, belonging to the Class Gastropoda, Order Nudibranchia, and Family Arminidae. This classification places it among the numerous species of sea slugs, characterized by their lack of an external shell and their often striking coloration.
Feeding
Armina occulta is a predatory nudibranch with a specialized diet consisting primarily of coral polyps. This feeding behavior, known as corallivorous, plays an important role in the ecological balance of coral reef ecosystems. Armina occulta uses its radula, a ribbon-like structure in its mouth, to scrape and ingest coral polyps. It also feeds on other marine invertebrates, highlighting its predatory nature.
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