Rainbow Shiner

Rainbow Shiners bring subtle silver tones that can develop into vivid pink, purple, and blue during breeding condition. The strongest colors are seasonal and are usually most pronounced in mature males, so every fish will not look like a breeding male throughout the year.

Fish details

• Scientific name: Hydrophlox chrosomus, widely known by its former name Notropis chrosomus
• Size offered: 3.5–4 cm
• Adult size: Usually around 5–8 cm
• Origin: Southeastern United States
• Water type: Freshwater; cool, oxygen-rich stream conditions
• Temperament: Peaceful, active schooling fish

Recommended aquarium conditions

• Aquarium: 30 US gallons or larger, with generous horizontal swimming space
• Temperature: 18–22°C (64–72°F) as a practical aquarium target
• pH: Around neutral; stable conditions are more important than chasing a precise number
• Social needs: A school of 10 or more

Create a stream-style setting using smooth stones, gravel, and open swimming lanes. Provide good circulation and aeration, with calmer places to rest. A tight cover is recommended. Avoid stagnant water and abrupt changes in temperature.

Diet and feeding

Offer small, high-quality flakes or pellets along with appropriately sized live or frozen invertebrate foods. Feed in small amounts and observe the entire school. Their busy behavior should be matched with enough food access, without allowing leftovers to accumulate.

Compatibility and care

Good companions are peaceful fish that also need cool, well-oxygenated water. Avoid long-term hot tropical setups and aggressive fish. A properly sized school encourages confident behavior and natural displays. Use a cycled aquarium, test water regularly, and maintain consistent partial water changes. Color intensity should never be treated as a guarantee of sex or breeding readiness.

Sizes are approximate. Contact Las Vegas Exotic Fish at (702) 685-5100 to confirm availability or discuss your setup.