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Fish Freshwater Care: hard Peaceful

Honey Blue-eye

Pseudomugil mellis
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Other names: Mellis
Group: Rainbowfish · Family: Pseudomugilidae · Origin: Australia — coastal heathland (wallum) streams and swamps of southeast Queensland

A tiny 3 cm blue-eye with a honey-amber body and blue eyes. Endangered in the wild, it needs very soft, acidic water and is a collector's species suited to expert nano aquariums.

Will it suit my tank?

Last updated October 16, 2026

Temperature
22–28°C
pH
5.5–7
Hardness
1–8 dGH
Adult size
3 cm
Minimum tank size
30 liters
Social structure
School
Group
at least 6, ideally 10+
Male–female ratio
Dişi ağırlıklı (1 erkek : 2–3 dişi)
Swimming zone
Top
Diet
Omnivore
Breeding
Egg scatterer

Water parameters

Temperature22–28°C
pH5.5–7
General hardness (GH)1–8 dGH
Recommended range
May escape, needs a lid Considered shrimp safe Suitable for planted tanks

Overview

October 16, 2026 · Suggest an edit

The honey blue-eye is a tiny species endemic to the tea-colored, very soft and acidic streams of the sandy coastal heathland (wallum) of southeast Queensland. It is named after the honey-amber body of the males; its blue eyes and dark-edged fins form a lovely contrast with this warm tone. It is about 3 cm long. It is endangered in the wild because its habitat is shrinking due to coastal development and land use; fish in the hobby come from captive-bred lines and should not be collected from the wild.

Tank Setup

October 16, 2026 · Suggest an edit
  • At least 30 liters for a group of 6–10.
  • 24–26°C, very soft and acidic water (pH 5.5–6.5 ideal); tannins from dried leaves and roots are beneficial.
  • Dense plants, moss and floating plants; weak flow.
  • Small, frequent water changes; avoid sudden changes in water parameters.
  • Hybridization: It can hybridize with other Pseudomugil species; breed the species separately to keep a pure line.

Diet

October 16, 2026 · Suggest an edit

Omnivorous but with a very small mouth. It feeds on newly hatched brine shrimp, cyclops, microworms and powdered foods; live food is important for conditioning.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

Peaceful and delicate; it stays near the surface, and males display to each other. It does not harm shrimp.

Good companions: Caridina and Neocaridina shrimp, Boraras, otocinclus, very small peaceful fish that like soft water.

Avoid: Any fish that can fit it in its mouth, fast and greedy species, fish that need hard water; other Pseudomugil species if you plan to breed.

A short profile for this species

The Honey Blue-eye page has the basics, but the sections below have not been written yet. If you keep this species, write a section from your own experience; it will be published under your name after editor approval.

Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Usually compatible

Should not be kept together

Hobbyist notes

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Change history and contributors
  1. Page created · October 16, 2026