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About the Ivantsoff's Blue-eye

The Ivantsoff's Blue-eye is a rare and highly sought-after nano rainbowfish, celebrated for its brilliant electric blue eyes, delicate translucent body, and beautifully extended fins. Native to the coastal swamps and slow-moving freshwater habitats of southern New Guinea, this peaceful species is a favourite among aquascaping enthusiasts and collectors of Pseudomugil species.

Mature males are especially spectacular, displaying elongated dorsal and anal fins adorned with bright yellow, orange, and black highlights. During courtship, males perform elegant display dances, flaring their fins and intensifying their colours to attract females. Their vivid blue eyes and graceful movements make them a captivating feature in any planted aquarium.

Ivantsoff's Blue-eyes thrive in mature, heavily planted aquariums with floating plants, mosses, driftwood, and gentle water movement. They are highly social and should be kept in groups of at least 8–10, where they display natural schooling behaviour and become significantly more confident. Their peaceful temperament makes them excellent companions for Celestial Pearl Danios, Ember Tetras, Chili Rasboras, Strawberry Rasboras, Pygmy Corydoras, Otocinclus, Medaka, and freshwater shrimp.

A varied diet of premium nano pellets, crushed flakes, baby brine shrimp, microworms, vinegar eels, daphnia, cyclops, and other tiny live or frozen foods will maximise their colouration, health, and breeding behaviour.

Graceful, colourful, and full of personality, the Ivantsoff's Blue-eye is a superb choice for planted nano aquariums and peaceful freshwater community tanks.

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Quick Care Guide

Scientific Name

Pseudomugil ivantsoffi

Common Name

Ivantsoff's Blue-eye

Origin

Southern New Guinea

Adult Size

3–4 cm

Temperament

Peaceful

Diet

Omnivore

Minimum Tank Size

40 Litres

Temperature

24–28°C

pH

6.5–7.8

Water Hardness

3–15 dGH

Difficulty

Beginner

Lifespan

2–4 Years

Suitable For

Nano aquariums, planted tanks, shrimp aquariums, and peaceful community aquariums

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Frequently Asked Questions

How many Ivantsoff's Blue-eyes should I keep?

Ivantsoff's Blue-eyes are schooling fish and should always be kept in groups of at least 8–10. Larger groups encourage natural display behaviour and improve confidence.

Are Ivantsoff's Blue-eyes peaceful?

Yes. They are extremely peaceful and are ideal companions for other nano fish and freshwater shrimp.

What do Ivantsoff's Blue-eyes eat?

They thrive on premium nano pellets, crushed flakes, baby brine shrimp, microworms, vinegar eels, daphnia, cyclops, and other tiny live or frozen foods.

Can Ivantsoff's Blue-eyes live with shrimp?

Yes. They are excellent tank mates for Cherry Shrimp, Crystal Shrimp, Amano Shrimp, and other dwarf shrimp. Newly hatched shrimplets may occasionally be eaten, but adults are generally left alone.

Are Ivantsoff's Blue-eyes easy to breed?

Yes. They are continuous egg scatterers that readily spawn among fine-leaved plants, mosses, and spawning mops in well-maintained aquariums.

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Common Mistakes

Keeping them in small groups

Ivantsoff's Blue-eyes become shy and lose their vibrant display behaviour when kept in insufficient numbers.

Feeding oversized foods

Their tiny mouths require appropriately sized foods such as micro pellets, crushed flakes, and small live or frozen foods.

Bright aquariums with little cover

Floating plants, dense vegetation, and subdued lighting help bring out their best colours and reduce stress.

Poor water quality

Clean, stable water with regular maintenance is essential for their health and longevity.

Housing them with large or aggressive fish

Choose peaceful nano species that won't outcompete or intimidate these delicate Blue-eyes.

About the Ivantsoff's Blue-eye

The Ivantsoff's Blue-eye is a rare and highly sought-after nano rainbowfish, celebrated for its brilliant electric blue eyes, delicate translucent body, and beautifully extended fins. Native to the coastal swamps and slow-moving freshwater habitats of southern New Guinea, this peaceful species is a favourite among aquascaping enthusiasts and collectors of Pseudomugil species.

Mature males are especially spectacular, displaying elongated dorsal and anal fins adorned with bright yellow, orange, and black highlights. During courtship, males perform elegant display dances, flaring their fins and intensifying their colours to attract females. Their vivid blue eyes and graceful movements make them a captivating feature in any planted aquarium.

Ivantsoff's Blue-eyes thrive in mature, heavily planted aquariums with floating plants, mosses, driftwood, and gentle water movement. They are highly social and should be kept in groups of at least 8–10, where they display natural schooling behaviour and become significantly more confident. Their peaceful temperament makes them excellent companions for Celestial Pearl Danios, Ember Tetras, Chili Rasboras, Strawberry Rasboras, Pygmy Corydoras, Otocinclus, Medaka, and freshwater shrimp.

A varied diet of premium nano pellets, crushed flakes, baby brine shrimp, microworms, vinegar eels, daphnia, cyclops, and other tiny live or frozen foods will maximise their colouration, health, and breeding behaviour.

Graceful, colourful, and full of personality, the Ivantsoff's Blue-eye is a superb choice for planted nano aquariums and peaceful freshwater community tanks.

---

Quick Care Guide

Scientific Name

Pseudomugil ivantsoffi

Common Name

Ivantsoff's Blue-eye

Origin

Southern New Guinea

Adult Size

3–4 cm

Temperament

Peaceful

Diet

Omnivore

Minimum Tank Size

40 Litres

Temperature

24–28°C

pH

6.5–7.8

Water Hardness

3–15 dGH

Difficulty

Beginner

Lifespan

2–4 Years

Suitable For

Nano aquariums, planted tanks, shrimp aquariums, and peaceful community aquariums

---

Frequently Asked Questions

How many Ivantsoff's Blue-eyes should I keep?

Ivantsoff's Blue-eyes are schooling fish and should always be kept in groups of at least 8–10. Larger groups encourage natural display behaviour and improve confidence.

Are Ivantsoff's Blue-eyes peaceful?

Yes. They are extremely peaceful and are ideal companions for other nano fish and freshwater shrimp.

What do Ivantsoff's Blue-eyes eat?

They thrive on premium nano pellets, crushed flakes, baby brine shrimp, microworms, vinegar eels, daphnia, cyclops, and other tiny live or frozen foods.

Can Ivantsoff's Blue-eyes live with shrimp?

Yes. They are excellent tank mates for Cherry Shrimp, Crystal Shrimp, Amano Shrimp, and other dwarf shrimp. Newly hatched shrimplets may occasionally be eaten, but adults are generally left alone.

Are Ivantsoff's Blue-eyes easy to breed?

Yes. They are continuous egg scatterers that readily spawn among fine-leaved plants, mosses, and spawning mops in well-maintained aquariums.

---

Common Mistakes

Keeping them in small groups

Ivantsoff's Blue-eyes become shy and lose their vibrant display behaviour when kept in insufficient numbers.

Feeding oversized foods

Their tiny mouths require appropriately sized foods such as micro pellets, crushed flakes, and small live or frozen foods.

Bright aquariums with little cover

Floating plants, dense vegetation, and subdued lighting help bring out their best colours and reduce stress.

Poor water quality

Clean, stable water with regular maintenance is essential for their health and longevity.

Housing them with large or aggressive fish

Choose peaceful nano species that won't outcompete or intimidate these delicate Blue-eyes.