Common Fish:
* Catfish: A diverse group with many species found worldwide.
* Carp: A common freshwater fish often used for food.
* Clownfish: Brightly colored fish known for their symbiotic relationship with anemones.
* Cod: A popular food fish found in colder waters.
* Crab (not technically a fish, but a crustacean): A common seafood item with many species.
Less Common Fish:
* Cichlid: A diverse family of freshwater fish with many colorful species.
* Coelacanth: A "living fossil" thought to be extinct until rediscovered in 1938.
* Cunner: A small, rocky shore fish common in the North Atlantic.
* Cutthroat Trout: A beautiful trout species found in western North America.
* Chub: A type of fish found in rivers and lakes worldwide.
This is just a small sample! The "C" category is quite expansive in the world of fish.