Ciona
Ciona is a genus of tunicates belonging to the family Cionidae. They are commonly known as sea squirts or sea peaches. These filter feeders are found in coastal waters around the world and are important members of marine ecosystems.
Characteristics
Ciona species are characterized by their sac-like bodies, with two siphons for water intake and expulsion. They have a tough, leathery outer tunic that protects them from predators. Ciona are typically solitary and attach themselves to solid surfaces such as rocks, docks, and boats.
Environments
Ciona are found in a variety of marine environments, including intertidal zones, shallow water, and deeper areas. They prefer areas with moderate water flow and relatively clean water conditions. They can tolerate a wide range of temperatures and salinities.
Species
The genus Ciona includes several species, including:
- Ciona intestinalis: This species is commonly found in the North Atlantic and is often used in research.
- Ciona savignyi: This species is found in the Mediterranean Sea and is also used in research.
- Ciona robusta: This species has recently been discovered in the Pacific Ocean.
References
For more detailed information about Ciona, you can consult these reliable resources: