Gertrudes Blue Eye Rainbows

🐟 Gertrude’s Blue Eye Rainbowfish (Gertrude's Blue-eye Rainbowfish)

Add delicate beauty and constant surface shimmer to your aquarium with the stunning Gertrude’s Blue Eye Rainbowfish. This small, elegant species is known for its bright blue eyes, translucent body, and finely patterned yellow fins with black spotting, creating a light, sparkling display in motion.

Peaceful, active, and perfect for planted aquariums, these fish bring subtle colour and graceful energy to nano and community setups.

🌿 Why Choose Gertrude’s Blue Eye Rainbowfish?

💙 Striking bright blue eyes
✨ Delicate yellow fins with black spotting
🐟 Active, surface-dwelling schooling fish
🌿 Ideal for planted and nano aquariums
⭐ Elegant and unique rainbowfish species

In groups, Gertrude’s Blue Eyes create a shimmering display near the surface, constantly moving and flashing their delicate fins in the light.

📏 Care Requirements

🧬 Scientific Name: Pseudomugil gertrudae
📛 Common Name: Gertrude’s Blue Eye Rainbowfish
🏠 Tank Size: 40L+ recommended
📏 Adult Size: ~3–4 cm
🌡️ Temperature: 24–28°C
⚗️ pH Range: 6.0–7.5
🧘 Temperament: Peaceful
🍽️ Diet: Micro pellets, flakes, frozen and live foods
👥 Group Size: 8–12+ strongly recommended

Gertrude’s Blue Eye Rainbowfish thrive in well-planted aquariums with gentle flow, open swimming space, and some floating plants for cover.

🐠 Compatibility

Excellent for peaceful nano and community aquariums. Ideal tank mates include small tetras, rasboras, Corydoras, shrimp, and other non-aggressive species. Avoid large or aggressive fish.

⚠️ Important Notes

These fish are best kept in groups to encourage natural behaviour and bring out their best colours. A tight-fitting lid is recommended, as they can jump. Males often display to each other, enhancing their fin colour and activity.

The Gertrude’s Blue Eye Rainbowfish is a perfect choice for UK aquarists wanting a small, elegant, and constantly active fish that adds sparkle and movement to planted aquariums.