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FishintermediateFreshwater

Ivantsoff's Blue Eye

Pseudomugil ivantsoffi

AnimaliaChordataActinopterygiiAtheriniformesPseudomugilidae

📍 Papua New Guinea

Ask Finn

Tiny blue-eyed beauty with yellow-tipped fins. Males display spectacular fin extensions. Perfect for nano planted tanks.

Size1.5"
Min Tank10g
School6+
peaceful
Zonetop

Care Guide

Diet

Ivantsoff's Blue Eyes are omnivores requiring a varied diet of high-quality micro pellets, small flake foods, and regular offerings of live or frozen foods such as brine shrimp, daphnia, and micro worms. Feed small amounts once daily, only what they can consume in a few minutes, as their tiny mouths require appropriately sized food particles.

Behavior

These peaceful, schooling fish are most active during dawn and dusk, displaying characteristic darting movements through planted areas. Males exhibit spectacular fin extensions and color intensification during territorial displays, though aggression is minimal. They prefer the upper water column and thrive in groups of at least 6 individuals, becoming stressed and dull when kept singly or in pairs.

Breeding

Breeding in captivity is moderately difficult and rarely occurs in standard aquarium conditions. They are egg-scatterers that require densely planted tanks with fine-leaved plants, slightly acidic water (pH 6.5), and temperatures around 26-27°C to trigger spawning. Fry are extremely small and require infusoria or liquid fry food for the first week before accepting micro foods.

Common Diseases

Ich (Ichthyophthirius multifiliis)

Symptoms

White spots on body and fins, rapid gill movement, lethargy, rubbing against objects

Treatment

Raise temperature gradually to 28-29°C, perform daily 25% water changes, use aquarium salt (1 tsp per 5 gallons) or commercial ich treatment; maintain for 10-14 days

Fin Rot

Symptoms

Frayed or deteriorating fin edges, discoloration at fin bases, lethargy

Treatment

Improve water quality with frequent partial water changes, remove any sharp decorations, use antibacterial medication if severe; ensure temperature stays 24-26°C

Columnaris (Flexibacter columnaris)

Symptoms

Whitish film on body or mouth, loss of appetite, rapid breathing, isolation

Treatment

Increase aeration, perform daily 50% water changes, treat with antibacterial medication; maintain temperature at 25-26°C and avoid stress

Parasitic Infections

Symptoms

Excessive scratching, visible parasites, clamped fins, weight loss despite feeding

Treatment

Use anti-parasitic medication designed for small fish; quarantine affected individuals; maintain pristine water conditions and perform frequent water changes

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Quick Facts

pH
6.5–7.5
diet
omnivore
maxSize
1.5 inches
minTankSize
10 gallons
temperature
72–82°F (22–28°C)

Temperature

72–82°F

22–28°C

Stats

Community tips0
Kept by0 hobbyists