Since there is so much mis-identification and claims of trophy Creek Chub catches, I decided to post these pictures here with a few simple ID keys. Mis-identification is a pet peeve of mine.
Dace - Tiny to small scales
Finescale Dace - tiny scales, lower and upper jaw almost equal in length, single solid black line from tip of snout to tail, with an iridescent copper to red strip above the red stripe. Usually found in slower current and marshy areas.
Northern Redbelly Dace - tiny scales, lower and upper jaw almost equal in length, two black stripes on side, the upper stripe usually broken close to the tail, the lower stripe from tip of snout to tail, a golden stripe in between the two black stripes, spawning males can develop red belly, usually found in slow to still water especially in ponds and marshes
Blacknose Dace - Tiny scales, upper jaw slightly longer than lower jaw, black speckled scattered throughout the body, dark stripe from tip of snout to tail, spawning male may develop a strong red stripe, usually found in moderate to swift current especially over sand, pebble and cobble.
Spawning male
Gravid female
Longnose Dave - Tiny scales, upper jaw significantly longer than lower jaw, long snout, black speckled scattered throughout the body, mottled blotchy dark patterns, spawning males may develop red around belly area, black stripe from tip of snout to tail, usually found over swift current especially over pebble and cobble.
Redside Dace - Small scales, upper jaw slightly shorter than lower jaw, long jaw extending to the middle of the eye, smaller speckled black spots scattered, scattered matted scales giving an appearance of scale loss, green back with faint red strip from behind the gill to mid body, often intensifying in spawning individuals, usually found in swift current close to the water surface feeding on prey on or above water surface.
Chub - larger head and mouth but comparatively smaller eye, rounded pelvic fins, spawning males develop tubercules (horns) on head used for fighting
Creek Chub - small scales, black stripe from tip of snout to tail, spot on dorsal fin, spot on caudal fin but this spot may be absent in larger individuals, very thin dark scale edges on scales where the lateral black stripe is found, juveniles, females and non-spawning males have a golden strip above the black stripe, large broad head with large mouth, more often found in slow current to still water, but can also be found over moderately swift current, especially juvenile individuals that hide among rocks.
Gravid female
Spawning male
River Chub - medium scales with pearly centers, thin dark edges on scales, faint to moderate dusky stripe from tip of snout to tail, small mouth with slight overhanging upper jaw, often red or orange eye, males develop strong tubercules, often a golden appearance on back, closely resembles Creek Chub but lacks black spot on dorsal fin, found in moderately swift to slow current over cobble to sand.
Hornyhead Chub - medium scales with strong black edges, faint to moderate dusky stripe from tip of snout to tail, small mouth with moderate overhanging upper jaw, males develop a red spot behind the eye that is always present, despite the name, male only develop small tubercules compared to Creek Chub and River Chub, found in moderately swift to slow current over cobble to sand.