The Pacific Blue Eye, scientifically known as Pseudomugil signifer, is a captivating and resilient species of freshwater fish native to the coastal rivers and streams of eastern Australia and Papua New Guinea. This species is highly valued by aquarists for its vibrant appearance, peaceful demeanor, and adaptability, making it an excellent addition to well-maintained community aquariums.

Pacific Blue Eyes are characterized by their slender, elongated bodies and striking coloration. Their bodies are typically a translucent blue or silver, with males displaying more intense iridescent blue and yellow hues, particularly during breeding displays. The males also have long, flowing dorsal and anal fins that can be brightly colored, adding to their overall visual appeal. Females are generally less colorful but still possess a subtle beauty.

In captivity, Pacific Blue Eyes thrive in aquariums that closely mimic their natural habitat. A tank setup should include a soft, sandy or fine gravel substrate and plenty of live plants, such as Java moss, Anubias, and Vallisneria, which provide cover and create a comfortable environment. Adding rocks, driftwood, and floating plants can also enhance the tank's natural look and provide additional hiding spots.

Water conditions should be slightly alkaline to neutral, with moderate hardness. These fish are relatively hardy and can adapt to a range of water conditions, but maintaining stable parameters through regular water changes and efficient filtration is crucial for their health and well-being. They also appreciate a gentle to moderate water flow, which replicates their natural environment.

Pacific Blue Eyes are social fish that should be kept in groups of at least six or more to promote their well-being and natural schooling behavior. Keeping them in a school not only reduces stress but also enhances their vibrant colors and active swimming patterns. They are peaceful and can be housed with other small, non-aggressive fish, making them ideal for community tanks.

Their diet should be varied to ensure they receive all necessary nutrients. Pacific Blue Eyes are omnivorous and will readily accept high-quality flake foods, micro pellets, and live or frozen foods such as brine shrimp, daphnia, and bloodworms. Including some vegetable matter, like spirulina flakes or blanched spinach, can also be beneficial for their overall health.

Breeding Pacific Blue Eyes in captivity is relatively straightforward under the right conditions. They are egg scatterers, typically laying their eggs among fine-leaved plants or in spawning mops. To encourage breeding, maintain optimal water conditions with slightly warmer water and provide plenty of fine-leaved plants or spawning mops. Once spawning occurs, it is advisable to remove the adults from the breeding tank to prevent them from eating the eggs. The eggs usually hatch within a week, and the fry can be fed with infusoria or finely crushed flake food until they are large enough to accept standard fare.

Overall, the Pacific Blue Eye is an excellent choice for aquarists looking for a colorful, peaceful, and adaptable species. Their striking appearance, gentle nature, and ease of care make them a delightful addition to any well-maintained community aquarium. With proper care, they can thrive and bring a touch of vibrant beauty and lively activity to your aquatic setup.