Chromodoris

Chromodoris is a genus of colorful sea slugs, also known as nudibranchs, belonging to the family Chromodorididae. These marine gastropod mollusks are characterized by their vibrant and often intricate patterns, which serve as aposematic coloration, warning potential predators of their toxicity. Chromodoris species are found in tropical and subtropical waters worldwide, inhabiting coral reefs and other shallow marine environments.

These nudibranchs are detritivores, feeding primarily on sponges. They possess specialized radulae that allow them to scrape and consume sponge tissue. Interestingly, Chromodoris nudibranchs sequester toxic compounds from their sponge diet, which they then utilize for their own defense. This remarkable adaptation makes them unpalatable to many fish and other marine animals.

The morphology of Chromodoris is distinctive. They typically have a flattened, elongated body with a mantle that overhangs the foot. A prominent feature is the circlet of gills, called a branchial plume, located on their dorsal side, which is used for respiration and can be retracted for protection. Two rhinophores, sensory tentacles, are located at the anterior end of the body.

Reproduction in Chromodoris involves internal fertilization, and like most nudibranchs, they are hermaphroditic. They lay their eggs in spiral-shaped masses attached to their food source. The larvae are planktonic, dispersing to new areas before settling and undergoing metamorphosis into adult slugs. The genus is diverse, with numerous species described, each often exhibiting unique color variations and specific dietary preferences.