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The Rosyface Shiner (Notropis rubellus) is a small, slender freshwater fish belonging to the family Leuciscidae. It is characterized by its silvery body, often with a pinkish or reddish flush, particularly on the head and fins of breeding males. This species is known for its preference for clear, cool, flowing waters and its schooling behavior. It plays an important ecological role as a forage fish for larger piscivorous species.
Physical Characteristics
- Body shape
- elongated
- Coloration
- Silvery body, often with a dusky lateral stripe. Breeding males develop a distinctive rosy-red coloration on the snout, opercles, and fins (especially pectoral, pelvic, and anal fins). The dorsal surface is typically olive to brownish-green, fading to silvery-white on the belly. Fins are generally clear to yellowish, becoming reddish in breeding males.
- Scale type
- cycloid
- Mouth position
- terminal
- Distinctive features
- Large eyes relative to head size., Pointed snout., Terminal mouth., Absence of a barbel., Lateral line complete and slightly decurved., Breeding tubercles (nuptial tubercles) on the head and fins of males during spawning season.
- Dorsal fin
- Typically 8 rays, originating slightly behind the pelvic fin origin.
- Tail fin
- Deeply forked, with pointed lobes.
- Pectoral fin
- Long and somewhat pointed, often reaching past the pelvic fin origin in larger individuals.
- Distinctive fins
- Fins are generally clear to yellowish, becoming bright red or rosy in breeding males.
Identification Tips
Coloration (breeding males)
Look for the distinctive rosy-red flush on the head and fins, especially during the spring and early summer spawning season. This is the most reliable field mark for breeding individuals.
Body Shape and Size
Slender, elongated body, typically reaching 7-10 cm (3-4 inches) in length. Larger individuals can reach up to 12 cm (5 inches).
Mouth Position
Terminal mouth, indicating its feeding habits on drifting invertebrates.
Lateral Line
Complete and slightly decurved, with 36-40 scales.
Fin Ray Counts
Dorsal fin usually has 8 rays, anal fin typically has 10-12 rays. These counts can help differentiate from some similar shiner species.
Habitat
- Water type
- freshwater
- Depth
- Typically found in shallow to moderate depths (0.5 to 2 meters), but can be found deeper in larger rivers.
- Environment
- Prefers clear, cool, well-oxygenated streams and small to medium-sized rivers with moderate to swift currents. Often found over gravel or rocky substrates, avoiding silty or heavily vegetated areas. Commonly associated with riffles and runs.
- Geographic range
- Widely distributed in eastern North America, primarily in the Ohio River basin, Great Lakes basin (excluding Lake Superior), and Atlantic Slope drainages from New York south to North Carolina. Its range extends west into parts of the Mississippi River basin.
Aquarium Information
- Care level: intermediate
- Temperament: peaceful
- Diet: omnivore
- Minimum tank size: 30 gallons
- Temperature: 60-72°F (16-22°C)
- pH level: 6.5-7.5
- Hardness: 5-15 dGH
- Compatibility: Compatible with other peaceful, cool-water fish of similar size, such as other shiners, dace, and darters. Avoid aggressive or very large tank mates.
- Special requirements: Requires well-oxygenated water with good flow. A planted tank with open swimming areas and some hiding spots is ideal. Prefers a substrate of sand or fine gravel. Schooling species, so keep in groups of 6 or more.
Wild Information
- Conservation status: least concern
- Seasonality: Spawns primarily from late spring to early summer (May to July), with peak activity often in June. Activity levels are generally higher in warmer months.
- Market price: N/A (not typically sold for consumption)
- Commercial importance: low
- Taste: N/A (not typically consumed)
- Texture: N/A (not typically consumed)
- Nutritional value: N/A (not typically consumed)
Key Facts
Breeding Colorsbehavior
During the spawning season, male Rosyface Shiners develop a striking rosy-red coloration on their head and fins, making them one of the most visually appealing shiners.
Nest Associatesbehavior
Rosyface Shiners are known to be 'nest associates' or 'nest parasites' of other minnow species, particularly creek chubs (Semotilus atromaculatus). They lay their eggs in the nests constructed by these larger fish, benefiting from the nest protection and aeration provided by the host.
Dietary Flexibilitybehavior
While primarily insectivorous, Rosyface Shiners are opportunistic feeders, consuming a variety of aquatic and terrestrial insects, algae, and detritus, adapting their diet to available food sources.
Habitat Indicatorinteresting
Their preference for clear, cool, and well-oxygenated waters makes them a good indicator species for healthy stream ecosystems.
Safety Information
Safe- Safety level: safe
- Venomous: No
- Edibility: not recommended
- Handling notes: No specific handling precautions are necessary beyond standard fish handling practices to minimize stress to the fish. They are small and harmless.
Similar Species
Common Shiner
Luxilus cornutus
Common Shiner typically has a deeper body, larger scales, and a more rounded snout. Breeding males of Common Shiner develop a purplish-pink flush and prominent tubercles, but the overall body shape and scale size are key differentiators. Rosyface Shiner has a more slender body and smaller scales.
Spotfin Shiner
Cyprinella spiloptera
Spotfin Shiner has a distinct black spot at the posterior base of the dorsal fin, which is absent in the Rosyface Shiner. Spotfin Shiners also tend to have a more compressed body and a darker lateral stripe.
Striped Shiner
Luxilus chrysocephalus
Striped Shiner has a deeper body and more prominent, often darker, lateral stripes. Its scales are also larger than those of the Rosyface Shiner. Breeding males of Striped Shiner develop a golden-orange coloration, distinct from the rosy-red of N. rubellus.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Cypriniformes
- Family
- Leuciscidae
- Genus
- Notropis
- Species
- rubellus
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