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Dusky Shiner
Fish Active during the day

Dusky Shiner

Pteronotropis cummingsae

iNaturalist Wikipedia

A shimmering inhabitant of the Southeast's mysterious blackwater streams, the Dusky Shiner is a master of the slow-moving current. With its sleek lateral stripe and seasonal flashes of color, this endemic minnow is a vital link in our coastal ecosystems.

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Quick Identification

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Size

A small minnow typically reaching 4.5–6 cm (1.8–2.4 inches) in length, with a maximum of about 7.2 cm (2.8 inches).

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Colors

Olive to dusky brown back with a prominent dark lateral stripe extending from the snout to the base of the tail. Breeding males develop striking orange or reddish tints on their fins and a more yellowish hue on their lower bodies.

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Key Features

  • Distinct dark lateral stripe through the eye to the tail
  • Slender, laterally compressed body
  • Usually 10-11 anal fin rays
  • Small, terminal mouth oriented slightly upward
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When You’ll See Them

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Activity pattern Active during the day
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Peak hours 9 AM - 4 PM
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Season April-August (Spawning season brings higher activity and brighter colors)
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Diet Primarily an invertivore, the Dusky Shiner feeds on drifting aquatic insects, small crustaceans (like water fleas), and occasionally surface-dwelling insects that fall into the water. They also ingest a small amount of filamentous algae.
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Habitat Slow-moving coastal plain streams, blackwater rivers, swamps, and vegetated ponds with acidic, tannic water.

public Geographic range

Where Does the Dusky Shiner Live?

The Dusky Shiner is a native gem of the North American Southeastern Coastal Plain. Its core range spans from the lower Tar River drainage in North Carolina, extending south through the river systems of Georgia and into the St. Johns River drainage in Florida. It is also found moving westward through the panhandle of Florida and into the Choctawhatchee River drainage in Alabama. It is endemic to this specific region and has not been introduced elsewhere.

Basemap © OpenStreetMap contributors

1 Countries
165K km² Range
Least Concern Conservation
US United States
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iNaturalist / Verified observation data
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Behavior

The Dusky Shiner is a social, schooling species that navigates the sluggish, often tea-colored waters of the Southeastern United States. Unlike some of its more aggressive minnow cousins, the Dusky Shiner is relatively peaceful, spending its time hovering near submerged vegetation or woody debris where it can easily dart away from larger predators like bass or pickerel.

During the spawning season, which typically spans from late spring through summer, these fish become much more active and visible. Males will congregate in clearer patches of water or near the nests of other fish species to broadcast their eggs. They are highly attuned to water quality and flow, preferring the 'blackwater' environments created by decaying organic matter in coastal plain ecosystems.

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Camera Tips

Capturing the Dusky Shiner requires an underwater approach, as traditional trail cameras won't trigger through the water's surface. Use a waterproof action camera or a dedicated underwater AI-powered camera. Because these fish inhabit 'blackwater'—which is stained dark by tannins—visibility can be a challenge. Place your camera in shallow areas (1-2 feet deep) where sunlight can penetrate the water column, ideally between 10 AM and 2 PM when the sun is directly overhead.

Position the camera on a weighted tripod or a flat rock facing a patch of submerged aquatic vegetation or a fallen log. These structures act as natural focal points for schooling shiners. To attract them into the frame, you can gently disturb the upstream sediment to release natural larvae, or use a small mesh bag with crushed fish flakes or bloodworms tied just out of the camera's view but within the scent line.

Since PIR motion sensors do not work underwater, set your camera to 'Time-Lapse' mode with an interval of 5-10 seconds, or use continuous video if your battery allows. If using an AI-powered camera, ensure the lens is clean of algae; a quick wipe with a microfiber cloth before submersion is essential. During the summer spawning months, look for areas with slightly higher flow or sandy patches where the males might congregate, as this offers the best chance for high-action footage.

Similar Species

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

Taillight Shiner

The Taillight Shiner has a very distinct, dark rectangular spot at the base of the tail, whereas the Dusky Shiner's stripe simply ends at the tail.

Sailfin Shiner

Sailfin Shiners have a much taller, more dramatic dorsal fin, especially in males, compared to the more streamlined Dusky Shiner.

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Frequently Asked Questions

Dusky Shiners are diurnal, meaning they are most active during daylight hours. They are most easily spotted and filmed in the middle of the day, from 9 AM to 4 PM, when the sun illuminates the dark, tannic water they call home.
To attract Dusky Shiners, focus on maintaining a healthy native ecosystem. Planting aquatic vegetation like pickerelweed and ensuring there are submerged branches or 'large woody debris' provides them with essential cover. Avoid using pesticides nearby, as these fish are sensitive to water quality and rely on a steady supply of aquatic insects.
Their diet consists mostly of small invertebrates. They spend their days foraging for aquatic insect larvae, tiny crustaceans, and terrestrial insects that land on the water's surface. Occasionally, they will also nibble on algae.
They can be found in suburban areas of the SE United States if there is a preserved blackwater creek or a slow-moving drainage with good water quality. However, they are sensitive to siltation and pollution, so they are less common in highly developed urban environments.
The Dusky Shiner is best identified by its prominent dark lateral stripe and its anal fin ray count, which is usually 10-11. Unlike the similar Taillight Shiner, it lacks a distinct black spot at the very base of the tail fin.

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