Halgerda indotessellata is a species of sea slug, a marine gastropod mollusk in the family Discodorididae. This nudibranch is known for its distinctive appearance and intriguing feeding habits.
Description & Characteristics
Halgerda indotessellata is a medium-sized nudibranch, reaching a maximum length of approximately 40 mm. Its body is typically a pale yellow to cream color, with a distinctive pattern of dark brown or black spots and blotches. These spots are often arranged in irregular rows, giving the slug a mottled appearance. The mantle of Halgerda indotessellata is smooth and somewhat flattened, and it has a distinct raised edge that runs around the perimeter of the body. Its rhinophores are short and club-shaped, while its gills are branched and located on the dorsal side of the body.
Habitat and Occurrence
Halgerda indotessellata is found in a variety of marine environments, including shallow reefs, rocky shores, and seagrass meadows. Its depth range spans from the intertidal zone to depths of around 30 meters. The species has been recorded in various locations, including the Indo-Pacific region, the Red Sea, and the Mediterranean Sea.
Taxonomy
Halgerda indotessellata belongs to the Class: Gastropoda, Order: Nudibranchia, and Family: Discodorididae. This classification places it within a diverse group of marine snails that lack shells in their adult stage. The family Discodorididae encompasses a wide range of nudibranch species known for their distinctive features and feeding habits.
Feeding
Halgerda indotessellata is a specialist feeder, primarily consuming sponges. Its diet consists mainly of specific species of sponges, which it locates using its keen sense of smell. It uses its radula, a tongue-like structure with rows of teeth, to scrape off and ingest the sponge tissue. This feeding strategy allows Halgerda indotessellata to thrive in environments where its preferred sponge prey is abundant.
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