Doto onusta is a species of sea slug, a type of marine gastropod mollusk, belonging to the family Dotidae. These nudibranchs are known for their distinctive appearance and intriguing biology.
Description & Characteristics
Doto onusta is characterized by its slender, elongated body, typically reaching a maximum size of a few centimeters. Its body coloration varies, often exhibiting a combination of shades of white, yellow, and orange. The most striking feature of this nudibranch is its numerous, long, and slender cerata, which are finger-like projections along its back. These cerata are essential for respiration and defense.
Habitat and Occurrence
Doto onusta is primarily found in intertidal and subtidal zones, particularly in the northeastern Atlantic Ocean. This nudibranch prefers rocky habitats with abundant algae, making it a common sight in these environments. Its distribution extends from the British Isles to Norway, showcasing a preference for colder, temperate waters.
Taxonomy
Doto onusta is classified within the Gastropoda class, the order Nudibranchia, and the family Dotidae. This categorization highlights its evolutionary lineage and relationship to other nudibranchs and gastropods.
Feeding
Doto onusta is a carnivorous predator, feeding primarily on hydroids, which are colonial animals belonging to the phylum Cnidaria. The nudibranch uses its radula, a specialized tongue-like structure, to scrape and consume the hydroids. Doto onusta is unique among nudibranchs in its ability to sequester nematocysts, the stinging cells of hydroids, and use them for its own defense. This process, known as kleptocnidae, allows the nudibranch to effectively utilize its prey’s weaponry against potential threats.
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