1. Chub (Genus Leuciscus): This is the most common meaning. Chub are a group of freshwater fish belonging to the genus *Leuciscus* in the family Cyprinidae (carps and minnows). They are found in Europe and Asia.
Characteristics:
* Appearance: Chub have a somewhat elongated, torpedo-shaped body. They are typically silver or bronze in color with dark backs. They have a slightly upturned mouth with a small, terminal mouth.
* Size: They can grow to be quite large, with some species reaching over 30 inches in length.
* Habitat: Chub inhabit rivers, streams, and lakes with clear water and plenty of vegetation.
* Diet: They are omnivorous, feeding on insects, larvae, worms, and plant matter.
2. Other fish called "Chub":
* "Chub" is sometimes used as a common name for other fish species, such as:
* Chub mackerel (Scomber japonicus): A saltwater fish found in the Atlantic and Pacific Oceans.
* Southern chub (Nocomis micropogon): A North American fish, similar in appearance to the true chub.
* Yellow chub (Nocomis raneyi): Another North American fish, known for its bright yellow color.
To be clear about which "chub" you're asking about, provide more context, like where the fish is found or its specific name.