River-fish are a type of fish that live in rivers and streams. Two common river-fish are BASS and CHUB, both of which have four letters in their name. BASS are a type of freshwater fish that can be found in many rivers and streams. They are popular among anglers due to their size and fighting ability. CHUB are a type of freshwater fish that can be found in rivers and streams throughout Europe and North America. They are known for their large size and their ability to survive in cold water.