Pseudomugil signifer
Slim silver body with bright blue-glowing eyes and finnage edged in gold. Tolerates a wide range of hardness (some populations are brackish in the wild). Males fin-flick at each other in mock combat, all bluster, no harm.
Pacific Blue Eye (Pseudomugil signifer) reaches 3–5 cm as an adult and needs a minimum tank of 60 L. Native to Eastern Australia, it lives in the top to mid water column with a peaceful temperament. Aim for 18–28 °C, pH 6.5–8.0, and 8–25 dGH hardness. Lifespan is 2–3 years with good care. Keep pacific blue eye in groups of 8+, yes schoolers need numbers to display natural behaviour. Diet: carnivore, Micro pellet, daphnia, baby brine shrimp, crushed flake at the surface. Plant-safe: Yes. Shrimp-safe: Yes (with adults).
Care at a glance
Slim silver body with bright blue-glowing eyes and finnage edged in gold. Tolerates a wide range of hardness (some populations are brackish in the wild). Males fin-flick at each other in mock combat, all bluster, no harm.
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The parameters that decide whether pacific blue eye fits in your tank.
Top to mid
Yes
Group of 8+
Pseudomugilidae
Carnivore
Micro pellet, daphnia, baby brine shrimp, crushed flake at the surface.
2–3 yrs
Medium
Eastern Australia
Eastern Australia
Tank-mate safety and the species this one is documented to thrive (or fail) alongside.
Weighing it against something similar? Compare Pacific Blue Eye head to head:
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Pacific Blue Eye (Pseudomugil signifer) needs a minimum tank of 60 L. They live in the top to mid water column and should be kept in groups of 8+, so a longer footprint matters more than depth.
Target 18–28 °C, pH 6.5–8.0, and 8–25 dGH hardness. Acclimate slowly when moving them between water sources.
Shrimp safety: Yes (with adults). Plant safety: Yes.
Pacific Blue Eye are carnivore. Micro pellet, daphnia, baby brine shrimp, crushed flake at the surface.
On Fin & Stem's 1–5 difficulty scale this species rates 2/5. Forgiving, beginner-friendly once the tank is cycled. Breeding difficulty: medium.
Typical lifespan in a well-maintained tank is 2–3 years.
A planted tank is a system. Pair this fish with one entry from each other pillar to plan the whole scape.
