Fish diurnal

Carmine Shiner

Notropis percobromus

A hidden gem of North American streams, the Carmine Shiner dazzles with its namesake crimson hues during the spring spawning season. This energetic minnow is a master of the current, bringing a flash of vibrant color to clear, rocky waters.

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Quick Identification

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Size

5 to 8 cm (2 to 3.1 inches) in length; weight typically under 10 grams

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Colors

Silvery-white body with translucent fins; breeding males develop brilliant carmine-red on the head, snout, and gill covers.

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Key Features

Slender, streamlined body shape
Vibrant carmine-red head and pectoral fins during spring spawning
Pointed snout with a large, terminal mouth
Subtle silver-blue lateral stripe along the body

When You’ll See Them

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Activity pattern diurnal

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Peak hours 9 AM - 5 PM

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Season May-July

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Diet Primarily insectivorous, feeding on aquatic larval insects like midges and caddisflies, as well as terrestrial insects that fall onto the water's surface.

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Habitat Clear, cool streams and small rivers with gravelly or rocky bottoms and moderate to fast current.

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Behavior

Carmine Shiners are energetic, schooling fish that spend their lives battling the currents of clear, upland streams. They are highly active swimmers, often found in the 'riffles'—the shallow, fast-moving sections of a stream where water flows over rocks. Unlike some sedentary bottom-dwellers, these shiners are constantly on the move, darting through the water column to intercept drifting prey.

During the day, they form loose aggregations, utilizing their streamlined bodies to minimize resistance against the flow. Their social structure is most evident during the late spring spawning season when males become territorial over specific gravel beds. They are an excellent indicator of stream health, as they are sensitive to siltation and low oxygen levels, making their presence a sign of a high-quality aquatic ecosystem.

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Camera Tips

Capturing the Carmine Shiner requires an underwater setup, such as a specialized aquatic trail camera or a waterproof action camera mounted on a weighted base. To get the best shots, place your camera in the transition zone between a deep pool and a shallow riffle. Position the lens to face slightly upstream; this allows you to catch the fish as they swim toward the current, showcasing their faces and the vibrant red 'carmine' coloration of the males during the spring months.

Lighting is your biggest challenge underwater. Aim to record during mid-day when the sun is directly overhead to penetrate the water column. Avoid placing the camera in deep shade, as the silver scales of the shiner need bright light to truly shimmer. If your camera allows for it, a high frame rate (at least 60 frames per second) is highly recommended. These fish are incredibly fast, and standard frame rates often result in a silver blur rather than a clear image of their delicate features.

While you shouldn't dump food into a natural stream, you can naturally 'lure' them into frame by gently disturbing the gravel about three to five feet upstream of your camera. This releases aquatic macroinvertebrates into the current, which will often trigger a feeding frenzy right in front of your lens. Ensure your camera is anchored securely with a sandbag or heavy rocks, as the very current these fish love can easily sweep away a lightweight camera housing.

Seasonality is key for the most dramatic footage. Target the window from late May to early July when the water temperatures reach about 65°F (18°C). This is when the males transform into their brilliant red breeding plumage. Outside of this window, they remain attractive silvery fish, but you will miss the namesake 'carmine' display that makes this species a favorite for backyard stream observers.

Similar Species

Species that look similar or are commonly confused with Carmine Shiner.

Rosyface Shiner

Nearly identical in appearance, but generally occupies more eastern ranges and has a slightly more slender snout.

Emerald Shiner

Lacks the brilliant red head of the breeding Carmine Shiner and has a more pronounced iridescent green-silver sheen.

Frequently Asked Questions

Carmine Shiners are strictly diurnal, meaning they are active during daylight hours. They are most easily spotted and photographed between 9 AM and 5 PM when the sun provides enough light to see through the water and their insect prey is most active.

The best way to attract Carmine Shiner is to maintain a healthy, clear stream environment. Planting native riparian vegetation helps stabilize banks and reduces silt. They are attracted to clean gravel beds and well-oxygenated water, so ensuring your section of the stream has natural riffles and rocks will encourage them to stay.

They have a varied diet consisting mostly of small insects. They eat aquatic larvae like mayflies and midges, but they also frequently 'rise' to the surface to snatch terrestrial insects like ants or small flies that have fallen into the water.

They can be found in suburban areas if the local streams remain clear and unpolluted. However, they are very sensitive to urban runoff and siltation from construction, so they are more common in protected parks or rural areas with high water quality.

Telling them apart is a challenge even for experts. The Carmine Shiner is generally found further west and north (like the Ozarks and Red River drainage), and tends to have a slightly more robust body and subtle differences in the number of scales along its lateral line compared to the Rosyface Shiner.

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