Rainbow Shiner (Select grade, male only)

Spectacular, iridescent, and breathtakingly colourful — the Rainbow Shiner (Notropis chrosomus) is one of North America's most stunning native fish. During breeding season, males transform into living rainbows — displaying a dazzling combination of electric blue, pink, purple, and gold that rivals any tropical fish. Our select-grade males are hand-picked for the most vibrant colouration available.

Overview

Appearance

Select-grade males in breeding condition are truly extraordinary — their bodies shimmer with an iridescent blue-purple lateral band, a rosy-pink to red flush on the belly and fins, and golden highlights that catch the light with every movement. Even outside of peak breeding colour, Rainbow Shiners display a beautiful silver-blue iridescence that makes them stand out in any aquarium. These are select-grade males, chosen for the most intense and complete colouration.

Water Parameters & Tank Setup

• Temperature: 60 – 72°F (15 – 22°C) — a cool-water species; avoid warm tropical temperatures
• pH: 7.0 – 8.0
• General Hardness (GH): 8 – 20 dGH
• Tank Size: Minimum 30 gallons for a school of 6+
• Lighting: Moderate to bright — their iridescent colours shine under good lighting
• Flow: Moderate to strong — they come from clear, well-oxygenated streams
• Substrate: Natural gravel or sand; smooth river stones add a natural feel
• Plants & Decor: Hardy cold-water plants or minimal decor with open swimming space

Diet & Feeding

• Staple: High-quality flake food or small pellets
• Treats: Frozen bloodworms, daphnia, brine shrimp, and small insects

Feed small amounts 2–3 times daily.

Compatibility & Tank Mates

Best kept in groups of 6 or more. Suitable cool-water tank mates include:

• Other native North American fish (darters, other shiners)
• White Cloud Mountain Minnows
• Hillstream loaches
• Dojo loaches

Avoid tropical fish that require warmer temperatures, as Rainbow Shiners thrive in cooler conditions.

Breeding

Rainbow Shiners are egg scatterers that spawn over gravel in flowing water. Males display their most intense colours during spawning season. A separate breeding tank with a gravel substrate and good flow can encourage spawning. Eggs hatch in 4–7 days and fry can be fed infusoria and baby brine shrimp.

The Rainbow Shiner is a truly extraordinary fish — a native North American species that rivals the most colourful tropical fish in the world. Our select-grade males represent the very best of this spectacular species. A must-have for cool-water aquarium enthusiasts.