Rainbow Shiner (Notropis chrosomus) – Vibrant, Colorful Schooling Fish

🌈 Rainbow Shiner (Notropis chrosomus) – Vibrant, Colorful Schooling Fish

The Rainbow Shiner is one of the most stunning freshwater schooling fish available, known for its electric blue, pink, and purple coloration—especially in males during breeding season. Native to cool, fast-flowing streams in the southeastern United States, the Rainbow Shiner is lively, peaceful, and perfect for planted or river-style aquariums.

These fish thrive in groups and display their best colors when kept in cool, clean, well-oxygenated water. Excellent for hobbyists wanting something unique, active, and brilliantly colored outside of tropical species.

🌟 Key Features

🌈 Incredible Coloration – Iridescent blues, violets, pinks, and golds
🐟 Peaceful Schooling Fish – Best in groups of 6+
🌬️ Loves Oxygen-Rich Water – Great for river-flow aquariums
💧 Coldwater Compatible – Thrives in cooler tanks (68–75°F)
🎨 Striking Breeding Colors – Males glow with neon intensity

⚙️ Care Guide

• Scientific Name: Notropis chrosomus
• Common Name: Rainbow Shiner
• Temperament: Peaceful, active
• Adult Size: 2.5–3 inches
• Diet: Omnivore – flakes, micro-pellets, frozen foods, live foods
• Tank Size: 20 gallons minimum (long recommended)
• Water Temperature: 68–75°F
• pH Range: 6.5–7.8
• Lifespan: 3–5 years
• Grouping: Keep 6+ for natural schooling behavior

💡 Tank Setup Tips

• Ideal for planted tanks, hillstream setups, and flow-heavy aquariums.
• Provide smooth rocks, driftwood, and open swimming areas.
• Use a strong filter or powerhead to mimic river flow.
• Great tankmates: White Cloud Minnows, Rosy Barbs, Danios, small loaches.
• Avoid aggressive or slow-moving fish.

❓ FAQ

Q: Do Rainbow Shiners need a heater?
A: Not usually—they prefer cooler, room-temperature water around 68–75°F.

Q: How many should I keep?
A: At least 6—they’re schooling fish and show better color in groups.

Q: Are they compatible with tropical fish?
A: Sometimes, but avoid very warm tanks (above 76°F).

Q: Are they good for beginners?
A: Yes—peaceful and hardy with proper water flow and oxygenation.