Hornyhead Chub

Nocomis biguttatus

Hornyhead_Chub_Nocomis_biguttatus_Female_6-9-13.jpg

Hornyhead chub female, side view photo with black background
Hornyhead chub, Nocomis biguttatus, female
Lance Merry
Family

Cyprinidae (minnows) in the order Cypriniformes (carps, minnows, and loaches)

Description

The hornyhead chub is a moderately large, slender, cylindrical minnow with a rather large, nearly horizontal mouth. A small, conical barbel is present at the corner of the mouth. The back and upper sides are olive brown with large, dark-edged scales, giving a crosshatched effect. The lower sides and belly are yellowish white. Males commonly have tubercles (bony projections) on top of the head and a prominent red spot behind the eye.

Similar species: The redspot chub is very similar in appearance and ecology, but it has a more limited and separate distribution, occurring in our state only in the Ozark portions of the Spring and Elk stream systems of southwestern Missouri.

Size

Total length: 5 to 7 inches; maximum about 10 inches.

Hornyhead_Chub_Nocomis_biguttatus_Spawning_Male_6-9-13.jpg

Hornyhead chub, male in spawning colors, side view photo with black background
Hornyhead Chub Male in Spawning Colors
Hornyhead chub, Nocomis biguttatus, male in spawning coloration
Habitat and conservation

Clear Ozark streams with permanent flow and clean gravel. Adults are found near riffles while young are usually found in pools, often hiding within plants.

Foods

Omnivorous, feeding on both plants and animals. Prey animals are mostly insects.

image of Hornyhead Chub distribution map
Distribution in Missouri

Occurs in all principal stream systems of the Ozarks not occupied by the redspot chub (which in Missouri occurs only in the Ozark portions of the Spring and Elk stream systems of southwestern Missouri).

Status

Nongame.

Life cycle

Lifespan can be 3 or 4 years. Most active in daytime. In late spring, males build conspicuous mounds of gravel 1 to 3 feet in diameter on which to spawn.

Human connections

Since about 1900, the hornyhead chub has disappeared or declined in many portions of its former range in Missouri. Intensive cultivation, with subsequent increase in siltation and intermittent flow in streams, may be important factors in the declining abundance of this chub in parts of Missouri.

Ecosystem connections

Numerous other minnows use hornyhead chub nests for spawning.