Pleurobranchus
Pleurobranchus is a genus of sea slugs, specifically nudibranchs, belonging to the family Pleurobranchidae. These marine gastropods are known for their flattened bodies and unique, often colorful, external gills. They are commonly found in intertidal and subtidal regions around the world.
Common Names
Common names for Pleurobranchus species include "pleurobranchs," "sea hares," and "foliated sea slugs."
Characteristics
Pleurobranchus species share several distinct characteristics:
- Flattened Body: Their bodies are dorsoventrally flattened, resembling a leaf or a flattened oval.
- External Gills: They possess prominent, branched external gills located on the dorsal surface, which are used for respiration.
- Rhinophores: They have two small, retractable sensory organs called rhinophores, which are used to detect food and their surroundings.
- Foot: The large, muscular foot is used for locomotion, with a distinct anterior flap called a "cephalic veil."
- Coloration: Pleurobranchus species can vary in color, ranging from brown and gray to vibrant orange and yellow, often with patterns and markings.
Environment and Distribution
Pleurobranchus species are found in a variety of marine environments, including:
- Intertidal Zones: They are often found in rocky intertidal areas, especially those with algae.
- Subtidal Regions: They can also be found in shallow subtidal zones, down to depths of several hundred meters.
- Worldwide Distribution: They have a wide geographic distribution, occurring in temperate and tropical waters around the world.
References
For more detailed information about Pleurobranchus, you can consult the following resources: