Thordisa diuda is a colorful and fascinating species of sea slug belonging to the family Discodorididae. Its vibrant colors and distinctive patterns make it a striking sight in the underwater world.
Description & Characteristics
Thordisa diuda is a relatively large nudibranch, reaching a maximum size of about 10 centimeters in length. Its body is typically oval-shaped and flattened, with a mantle that extends beyond the foot. It exhibits a bright orange or reddish-orange coloration, often adorned with numerous white or cream-colored spots. These spots can vary in size and distribution, creating a unique pattern on each individual. The rhinophores, which are sensory organs used for detecting food and chemicals, are short and club-shaped. The gills, located on the dorsal side of the body, are feathery and branched, contributing to the overall beauty of this species.
Habitat and Occurrence
Thordisa diuda is predominantly found in the Indo-Pacific region, inhabiting the warm waters of the tropical and subtropical zones. This species is particularly common in areas with coral reefs and rocky substrates. The species thrives in the shallow waters of the neritic zone, typically found at depths ranging from a few meters to about 30 meters. Its presence in these marine ecosystems makes it a significant part of the vibrant biodiversity of these regions.
Taxonomy
Thordisa diuda is classified within the phylum Mollusca, belonging to the Class Gastropoda, which encompasses a vast array of snails and slugs. This species falls under the Order Nudibranchia, a group of marine gastropods that lack a shell and often display striking coloration and patterns. The family Discodorididae, which includes Thordisa diuda, is characterized by its members’ typically flattened bodies and often brightly colored exteriors.
Feeding
Thordisa diuda is a carnivorous nudibranch, feeding primarily on sponges. These sea slugs are known to graze on a variety of sponge species, using their radula, a toothed ribbon-like structure, to scrape off and consume sponge tissue. The consumption of sponges is crucial for Thordisa diuda, as it derives nutrients and sometimes even defensive compounds from its prey. The presence of these compounds can provide protection from predators or even enhance the sea slug’s own defense mechanisms.
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