Ceratodoris

Common Names

Ceratodoris species are commonly referred to as "Chromodorid Nudibranchs" or simply "Nudibranchs." Some individual species have specific common names, such as the "White-lined Chromodorid" (Ceratodoris ocellata) or the "Orange-edged Chromodorid" (Ceratodoris aureomarginata).

Characteristics

Ceratodoris nudibranchs are characterized by their:

• Slender, elongated body with a distinct head and a tail that is often pointed.
• Brightly colored mantle, often with contrasting patterns and markings.
• Two rhinophores (sensory organs) located on the dorsal side of the head, resembling small, club-shaped antennae.
• Two oral tentacles located at the anterior end of the head, used for feeding and sensing prey.
• Gill plumes, also called cerata, located on the dorsal surface of the body, used for respiration and often contribute to the slug's colorful appearance.

Environments

Ceratodoris species are found in a variety of marine environments, including:

• Coral reefs: They are often found on coral reefs, particularly those with a high diversity of sponges.
• Rocky shores: Some species can be found on rocky shores, particularly in areas with crevices and overhangs.
• Seagrass beds: They may also be found in seagrass beds, where they feed on sponges and other invertebrates.

Diet

Ceratodoris nudibranchs are carnivores and primarily feed on sponges. They use their radula, a toothed ribbon in their mouth, to scrape and ingest sponge tissue. Some species may also consume other invertebrates, such as bryozoans and hydroids.

Reproduction

Ceratodoris nudibranchs reproduce sexually. They are hermaphroditic, meaning they have both male and female reproductive organs. During mating, they exchange sperm and lay egg masses. The egg masses are typically laid in coiled ribbons or spirals and are often brightly colored.

References

• World Register of Marine Species (WoRMS)
• Sea Slug Forum
• Nudibranch.info