Platydoris ocellata, commonly known as the “Ocellated Platydoris”, is a species of colorful sea slug belonging to the family Discodorididae. This striking nudibranch is characterized by its vibrant body coloration and unique features, making it a fascinating subject of study for marine biologists and enthusiasts alike.
Description & Characteristics
Platydoris ocellata is a relatively large nudibranch, typically reaching a maximum size of around 6 centimeters in length. Its body is generally oval-shaped, flattened dorsoventrally, and features a smooth, leathery texture. The most distinguishing characteristic of this species is its vibrant coloration. Its dorsal surface is a rich, deep orange, often dotted with numerous black spots, giving it an “ocellated” appearance. These black spots can vary in size and distribution depending on the individual. The underside of the nudibranch is typically a pale cream or off-white color. The mantle of Platydoris ocellata is broad and extends beyond the sides of the body, giving it a distinctive appearance.
Habitat and Occurrence
Platydoris ocellata is a common sight in tropical and subtropical regions of the Indo-Pacific, inhabiting shallow, rocky reefs and sandy bottoms. This species is particularly well-adapted to life in the intertidal zone, where it is often found foraging among rocks and seaweed. Its presence has been documented in various marine zones, including the Philippines, Indonesia, and the Red Sea. Platydoris ocellata prefers warm, clear waters with moderate wave action, and can be found at depths ranging from the surface to about 20 meters.
Taxonomy
Platydoris ocellata belongs to the Class: Gastropoda, Order: Nudibranchia, and Family: Discodorididae. The family Discodorididae encompasses a diverse array of colorful and often elaborately patterned nudibranchs, known for their broad, flattened bodies. These sea slugs are generally characterized by their lack of cerata, the finger-like projections found on the backs of other nudibranch species. The family is distributed worldwide, with members inhabiting various marine environments. Platydoris ocellata, with its striking coloration and unique features, stands out as a notable member of this fascinating family.
Feeding
Platydoris ocellata is a food specialist, relying primarily on sponges for sustenance. This nudibranch exhibits a strong preference for certain types of sponges, particularly those belonging to the genus Haliclona. These sponges are often brightly colored and textured, providing a rich source of nutrients for the nudibranch. Platydoris ocellata utilizes its radula, a chitinous ribbon lined with teeth, to scrape away and ingest sponge tissue. This feeding behavior allows the nudibranch to extract essential nutrients and energy from its sponge prey.
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