Pacific Blue-Eye Rainbowfish (Pseudomugil signifer) – 1.5-2 inches

🐠 Species Overview

The Pacific Blue-Eye Rainbowfish (Pseudomugil signifer), also known as the Signifer Rainbowfish, is a small, vibrant species native to the freshwater and brackish rivers and estuaries of coastal Western Australia. This peaceful and active fish is renowned for its striking blue eyes, silvery body, and distinctive forked tail. Males display bright yellow fins, especially during breeding, making them a colorful addition to any community tank. The Pacific Blue-Eye is an excellent nano species and is one of the most variable and versatile species of its family. 

🏡 Aquarium Setup & Care Instructions

Tank Size & Environment

• Minimum Tank Size: A 20-gallon (75 liters) aquarium is recommended to provide ample swimming space.  

• Substrate: Fine gravel or sand to mimic natural habitat.

• Decor: Dense plantings, driftwood, and floating plants for hiding and dim lighting.

• Water Parameters:

  • Temperature: 59–82°F (15–28°C), with 72–82°F (22–28°C) being optimal.  

  • pH: 6.5–7.5.  

  • Hardness: 12–15 dKH.

• Filtration: Gentle filtration to maintain water quality; sensitive to ammonia and nitrites.

Behavior & Tankmates

• Temperament: Peaceful and social; best kept in schools of 6 or more to reduce stress and encourage natural behavior. 

• Compatibility: Suitable for community tanks with other small, non-aggressive species. Avoid keeping with aggressive or fin-nipping fish.

Diet

• Feeding Habits: Omnivorous; offer a varied diet including high-quality flake foods, live or frozen foods like brine shrimp and daphnia, and occasional vegetable matter.