Rosyface Shiner

Fascinating facts about the Rosyface Shiner

• At just 9 cm (3.5 in) long, the rosyface shiner has a sleek fusiform body with iridescent blue-green stripes.
• During the pre-spawning period of late April to late May, 20 % of rosyface shiners had full stomachs, and by mid-June that figure was 80 %.
• Breeding males have red coloration on their face, head, and behind the gills, while breeding females show only minimal red coloration.
• Spawning takes place in shallow riffles 1–3 inches deep, where depressions 5–12 inches across serve as temporary nests. The fish vibrate together over each nest for 5–6 seconds, pause 30 seconds, and repeat for about 5 minutes before moving on.
• A one-year-old female can lay about 600 eggs, while a three-year-old can produce about 1,175 eggs, and the species lives up to three years.

At a glance

About the Rosyface Shiner

The rosyface shiner (Notropis rubellus) glides through the clear, fast-flowing streams of eastern North America with a sleek, fusiform silhouette that rarely exceeds 9 cm (3.5 in). Its silvery sides are laced with iridescent blue-green stripes, while the transparent pectoral and pelvic fins sit low on the abdomen. In breeding season, males flash a striking red on the face, head, and behind the gills, a subtle echo of crimson that also tinges females. Their forked caudal fin, angled inward, propels them over clean gravel and rubble riffles where they spend most of their lives, retreating to deeper pools and eddies in the cold of mid-November before returning to the riffles by mid-March. An opportunistic omnivore, the rosyface shiner devours a buffet of insects, caddisfly larvae, mayfly nymphs, diptera, along with fish eggs, algae, and diatoms, favoring the insect portion of its diet. It will leap from the water’s surface to snatch a passing fly, a surprising aerial hunt for a fish of its size. A 1957 study by Roger J. Reed recorded that 20 % of individuals carried full stomachs from late April to late May during pre-spawning, a figure that surged to 80 % by mid-June after spawning. Reproduction unfolds in a choreographed dance: schools of females lead, males trail, and pairs vibrate over gravel depressions 5–12 inches wide for brief bursts before resting, a ritual repeated every ten minutes until the eggs, about 600 for one-year-olds and up to 1,175 for three-year-olds, are deposited. The species lives to three years, completing its life cycle within the swift, clear waters it calls home.

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