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Pearl danio

Danio albolineatus

Pearlescent sheen and a strong need for swimming space. A social shoaling fish for a planted aquarium with open swimming space.

Pearl danio — Danio albolineatus
Photo: Sc99cs at English Wikipedia ( Original text: Steven Coburn sc99cs ) · Public domain

At a glance

Scientific name
Danio albolineatus
Dutch name
Pareldanio
Water temperature
16–25 °C
pH
6–8
Adult length, up to approximately
5.5 cm SL
Experience
Basic knowledge
General hardness (GH)
1–20 °dGH
Starting footprint
90 × 30 cm
Swimming or living zone
Midwater
Flow
Moderate, with sheltered areas

This is a documented adult size, not a measured average. SL means body length excluding the tail fin. Sex, origin and cultivated form can affect size.

Care guidance; origin and captive breeding can change requirements. Some ranges are deliberately narrower than natural extremes in the source. Adjust water gradually and keep ammonia and nitrite at zero.

Tank sizes are editorial starting points for adults, not guarantees for a complete stocking plan. Group size, tank height, swimming length and territories may require a larger aquarium.

Origin

Asia — Mekong / Asia

Habitat & setup

Tropical rivers and tributary waters; provide cover and open swimming space.

Diet

Varied fine pellets or flakes, supplemented with suitable frozen or live food.

Behaviour & grouping

Group, preferably 8–10 or more.

Living with other animals

Other active peaceful species in a spacious aquarium. Avoid slow or long-finned fish that may be chased or outcompeted.

Possible combinations to investigate further

These examples are conditional: check group size, space, hardness and behaviour. The displayed values only show overlapping ranges, not a guarantee of suitable stocking.

Reproduction

Egg-laying; eggs and fry usually need separate rearing.

A suitable cover helps prevent escape and jumping. Protect intakes for small animals. Do not use copper-based fish medication with invertebrates.

Sources & image credits

Data compiled on: 2026-09-27. Species sources support identity and care; group sources give general starting points. Practical recommendations are an editorial synthesis.

Photo: Danio_albolineatus.jpg — Sc99cs at English Wikipedia ( Original text: Steven Coburn sc99cs ). Public domain.