Cymodetta
Cymodetta is a genus of marine isopods belonging to the family Cymothoidae. These crustaceans are commonly known as “fish lice” due to their parasitic nature, attaching to the bodies of fish. The genus includes various species, each with its own specific host and geographical range.
Characteristics
Cymodetta species are distinguished by their elongated bodies, typically measuring between 5 to 15 millimeters in length. Their bodies are flattened dorsoventrally, allowing them to cling tightly to their hosts. They possess seven pairs of legs, with the first pair modified into strong, hooked claws for grasping.
Environment and Habitat
Cymodetta isopods are found in marine environments worldwide, predominantly in tropical and subtropical regions. They are typically found attached to the skin, gills, or mouths of their host fish. Some species may exhibit host specificity, meaning they only parasitize certain types of fish.
Life Cycle
The life cycle of Cymodetta isopods involves a series of stages, beginning with the egg. Larvae hatch from eggs and live as free-swimming parasites for a short period before attaching to a suitable host. The juvenile isopods then undergo several molts as they mature into adults.
Notable Species
Some notable species within the genus Cymodetta include:
- Cymodetta truncata: A common parasite of Atlantic cod and other species in the North Atlantic Ocean.
- Cymodetta gibbosa: Found in the Mediterranean Sea, parasitizing various fish, including wrasses and bream.
- Cymodetta tuberculata: A parasitic isopod found in the eastern Pacific Ocean, primarily on rockfish and other species.
References
For further information on the genus Cymodetta, consult the following resources: