The redfin shiner, also known as the roach, is a freshwater fish commonly found in calm waters of Quebec. Although it is not particularly sought after for sport fishing due to its modest size and limited fighting ability, it is appreciated by beginner anglers and pole fishing enthusiasts. Its presence is especially notable in lakes and rivers with low currents, where it contributes to local biodiversity. The redfin shiner is also a good indicator of water quality, as it prefers clear and well-oxygenated waters. In Quebec, it is mainly found in the southern part of the province, particularly in the watersheds of the St. Lawrence River and the Outaouais.

The redfin shiner is distinguished by its oval, laterally flattened body, silver in color with golden reflections. Its pectoral, pelvic, and anal fins are bright red, making it easily recognizable. Its mouth is small and oriented upwards, which is typical for fish that feed on the surface or in midwater. The scales of the redfin shiner are large and well-defined, providing effective protection while contributing to its shine. Young redfin shiners exhibit duller coloration, with less colorful fins compared to adults. During spawning, males develop small growths on their heads, called nuptial tubercles, which are not present in females.

In Quebec, the redfin shiner is mainly present in the southern regions, such as Montérégie, Estrie, and the Laurentians. It is abundant in the lakes and rivers of the St. Lawrence River basin and in some tributaries of the Outaouais. This fish prefers calm waters rich in aquatic vegetation, where it can feed and reproduce effectively. Its distribution is limited by its preference for warmer and well-oxygenated waters, which makes it less present in the northern regions of Quebec.

The redfin shiner favors the calm waters of lakes, ponds, and slow-flowing rivers. It is usually found in areas rich in aquatic vegetation, which provide both food and protection from predators. The redfin shiner prefers shallow waters, between 1 and 3 meters deep, where the temperature is higher. It is often observed near the shores, where it can feed on insects and small crustaceans living among aquatic plants. In summer, it does not hesitate to move to deeper waters when surface temperatures become too high.

The spawning of the redfin shiner occurs in spring, when the water temperature reaches around 15 °C. Females lay several thousand adhesive eggs on aquatic plants or rocky substrates. The eggs hatch within a few days, giving rise to fry that feed on plankton. Growth is rapid during the first months, and young reach sexual maturity in 2 to 3 years. The redfin shiner can live up to 9 years under optimal conditions. Spring → Spawning → Summer → Growth → Autumn → Winter preparation → Winter → Rest

The redfin shiner is a social fish, living in schools that can number in the dozens of individuals. It is not particularly territorial, preferring to move around to find food and shelter. This fish is sensitive to changes in light and temperature, which influence its daily movements. During the day, it often stays sheltered in vegetation, while it becomes more active at dusk and dawn. Schools of redfin shiners disperse in the face of danger but quickly regroup once the threat has passed.

The diet of the redfin shiner evolves with age. Fry primarily feed on plankton and small organic particles. As they grow, they diversify their diet to include aquatic insects, larvae, and small crustaceans. Adults also consume plant matter, such as algae and debris from aquatic plants. This omnivorous diet allows the redfin shiner to easily adapt to seasonal variations in food availability.

In spring, the redfin shiner is active and easy to observe near the shores, where it prepares for spawning. The best times to fish for it are early in the morning and late in the afternoon. In summer, it moves to deeper waters during the hot hours but returns near the shores when the temperature drops. In autumn, it becomes more difficult to locate as it prepares for winter by actively feeding. During winter, the redfin shiner enters a state of semi-lethargy, staying in deeper waters and feeding little.

For the redfin shiner, favor natural lures and baits. In clear waters, neutral colors like brown and green are effective. In murky water, opt for brighter colors like orange or yellow. On sunny days, metallic lures can attract attention, while in overcast weather, brightly colored lures can make a difference.

To fish for the redfin shiner, a light rod of 2 to 3 meters is sufficient, with a power of 2 to 4 lb. A light reel with a fine line of 2 to 6 lb is recommended. Use small hooks, between sizes 12 and 18, and a fine leader to avoid alerting the fish. A sensitive float will help detect subtle bites.

The redfin shiner should be handled carefully to avoid damaging its scales and fins. Always use wet hands to grasp it. For a successful release, support the fish under its belly and gently release it into the water. For a photo, avoid keeping it out of the water for more than a few seconds.

The redfin shiner is preyed upon by several aquatic and avian predators, including pike, yellow perch, herons, and osprey. These predators play an essential role in controlling redfin shiner populations.

In Quebec, the redfin shiner does not pose major conservation concerns. It is abundant in areas where it is found. However, it is important to respect local regulations regarding sizes and catch limits, and to practice catch-and-release whenever possible to maintain healthy populations.