Pacific Blue Eye Rainbowfish

Pseudomugil signifer

Pacific Blue Eye Rainbowfish is a peaceful middle-to-top swimmer. Keep in a loose group of 8+.

PeacefulMiddle to top swimmerKeep in a loose group of 8+Intermediate

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Need help with Pacific Blue Eye Rainbowfish?

Explore compatibility, care or problems using this guide and your aquarium’s conditions.

Quick facts

Adult size: ≤ 2.8" (≤ 7 cm)
Aquarium size: 14 US gal (54 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length
Care level: Intermediate
Temperament: Peaceful
Swimming zone: Middle to top swimmer
Temperature: 68–79°F (20–26°C)
pH: 6.5–7.5
GH: 5–15 dGH
Diet: Omnivore
Lifespan: up to 2 years
Group behavior: Keep in a loose group of 8+

Care requirements

Care level: Intermediate.

Lifespan: up to 2 years.

Aquarium size and space needs

Minimum aquarium size: 14 US gal (54 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length. Plan the layout and stocking within that limit.

Water parameters

Suitable water: temperature 20–26 °C, pH 6.5–7.5, GH 5–15 dGH.

Temperament and compatibility

Pacific Blue Eye Rainbowfish is peaceful and suits calm community fish.

Swimming zone and behavior

This fish uses the middle to upper part of the aquarium, so leave enough open swimming space for movement and feeding.

Feeding

Provide small live foods such as Daphnia, Moina, Artemia nauplii or microworms, with crushed/floating dried foods accepted.

How to feed aquarium fish — General freshwater community guidance

Before adding this fish

Plan for an aquarium of 14 US gal (54 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length.
Make room for its social group.
Avoid aggressive or highly competitive fish.
Keep in a loose group of 8+.
Offer a varied diet suited to this species’ documented feeding habits.

Natural habitat and origin

Origin: Australia.

Natural habitat: Coastal streams, swamps and estuaries of eastern Australia; populations occur in freshwater and brackish habitats, with records also from marine conditions.

Similar fish profiles

Use these profiles to compare fish with similar care level, size, temperature range, or swimming behavior.

Aru Rainbowfish Melanotaenia picta Same family Similar care level Same temperament Beginner – Intermediate ≤ 4.3" (≤ 11 cm) 72–79°F (22–26°C) Black Banded Rainbowfish Melanotaenia nigrans Same family Similar care level Same temperament Beginner – Intermediate ≤ 3.9" (≤ 10 cm) 73–82°F (23–28°C) Allpahuayo Dwarf Cichlid Apistogramma allpahuayo Similar care level Same temperament Same swimming zone Intermediate ≤ 2.8" (≤ 7 cm) 75–82°F (24–28°C) Blackline Tail Tetra Moenkhausia costae Similar care level Same temperament Same swimming zone Beginner – Intermediate ≤ 2.8" (≤ 7 cm) 72–79°F (22–26°C) Blue Panchax Aplocheilus panchax Similar care level Same temperament Same swimming zone Beginner – Intermediate ≤ 2.8" (≤ 7 cm) 68–79°F (20–26°C) Adonis Tetra Lepidarchus adonis Similar care level Same temperament Same swimming zone Intermediate ≤ 1.2" (≤ 3 cm) 72–79°F (22–26°C)

FAQ

How large does Pacific Blue Eye Rainbowfish get?

Pacific Blue Eye Rainbowfish reaches ≤ 2.8" (≤ 7 cm).

What aquarium size does Pacific Blue Eye Rainbowfish need?

Use an aquarium of at least 14 US gal (54 L) or larger / ≥ 23.6" (≥ 60 cm) minimum length.

Is Pacific Blue Eye Rainbowfish peaceful?

Yes. Pacific Blue Eye Rainbowfish is recorded as peaceful and is best planned with calm community fish that do not harass it or dominate the feeding area.

What temperature is suitable for Pacific Blue Eye Rainbowfish?

Keep it between 20 to 26 °C.

Should Pacific Blue Eye Rainbowfish be kept alone or in a group?

Pacific Blue Eye Rainbowfish: Keep in a loose group of 8+.