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Rasboras & Danios · Buying Guide

Galaxy Rasbora for Sale: Celestial Pearl Danio

Galaxy rasbora and celestial pearl danio are two names for Danio margaritatus. Before buying this small spotted fish, plan a planted aquarium, a social group and suitable food; check the individual listing for availability and sale unit.

Care and buying advice
Tropical Fish Co Editorial TeamBy Tropical Fish Co Editorial TeamUpdated 18 October 20264 min read
Illustration of a celestial pearl danio with pale flank spots and orange-dark fin markings in a planted aquarium.
AI-generated, reference-informed illustration of a celestial pearl danio. It is not a photograph of current stock or proof of an individual fish’s sex, size or health.Tropical Fish Co · generated editorial illustration· Own

The quick version

  • Confirm Danio margaritatus on the listing: a trade name alone is not an identity check.
  • Plan the group and swimming footprint together; a nano label does not establish a stocking allowance.
  • Choose quiet companions with compatible water needs and watch whether every fish gets food.

At a glance

Scientific name
Danio margaritatus; originally Celestichthys margaritatus
Common names
Galaxy rasbora, celestial pearl danio, CPD
Adult size
FishBase records 2.1 cm standard length, excluding the tail
Buying checks
Identity, group, footprint, food and sale unit
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5 expert sources cited

Galaxy rasbora or celestial pearl danio?

If you are looking for galaxy rasboras for sale, check for the name Danio margaritatus. The same small, spotted fish is sold as celestial pearl danio or CPD. It was originally described as Celestichthys margaritatus in 2007; the familiar common names have outlasted changes to its scientific name [2][1].

FishBase records a maximum of 2.1 cm standard length, measured without the tail [3]. That makes food size and access to food important buying questions. Ask what the offered fish are eating, then check the sale unit before deciding how many to order.

Care at a glance

A planted aquarium is useful for cover and broken sightlines. Male rivalry can include nipped fins, so avoid treating display behaviour as harmless in every group. Seriously Fish recommends a base of at least 45 by 30 cm; its published 20–26°C range is a starting screen for planning, rather than a reason to run the tank at an extreme [4].

Plan group size and space together. A 30-litre label does not establish room for ten fish plus a second shoal and bottom dwellers. For detailed group, water and feeding advice, use the celestial pearl danio care guide.

Measure the aquarium temperature

Check the tank through day and night and across the seasons. Decide whether heating is needed from those readings and the planned species' requirements; central heating or summer weather alone cannot settle that decision.

Prepare a cycled, filtered aquarium before purchase; waiting a fixed number of weeks is not proof that the filter can process the intended stocking [5].

Use food small enough for their mouths, combining an appropriate prepared diet with small live or frozen items. Check that quieter fish actually eat, rather than letting faster feeders take every meal.

Tank mates

Choose companions for quiet behaviour, compatible water and fair access to food. These fish can lose out to larger or more forceful feeders [4]. Do not use a list of small species as a ready-made community for a small tank.

The harlequin rasbora care guide helps compare another community fish, and the cherry shrimp care guide explains shrimp needs. Neither is an automatic companion recommendation. Small shrimp and young shrimp may be eaten, so a planted tank cannot promise a surviving colony.

Buying galaxy rasboras in the UK

Use the individual product page for current availability and the exact unit being sold. Before ordering, check the aquarium footprint, the planned social group, measured water conditions and the food the fish accept. If sex matters to your plan, ask what the listing actually guarantees rather than assuming that colour or a group purchase establishes a particular ratio.

Follow the transport and arrival instructions supplied for your order and check the current delivery terms at checkout. Review the arrival-reporting steps before completing checkout.

Browse the wider rasboras & danios and nano tank fish ranges, or the full tropical fish for sale UK listing. Compare their care needs before building a mixed order.

Galaxy rasbora names explained

Name diagram connecting galaxy rasbora and celestial pearl danio to Danio margaritatus.
Two trade names, one species name. Confirm the scientific name and sale unit on the individual listing; this text diagram cannot identify a fish.Diagram: Tropical Fish Co · Own

Related categories

Visual route into the rest of our UK live-fish range.

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Rasboras & Danios

Rasboras, danios and White Cloud Mountain Minnows. Compare adult space, temperature and group needs, then check each individual or pack offer.

Nano Tank Fish

Nano Tank Fish

Explore smaller aquarium and paludarium possibilities. Compare exact habitat, adult space, groups and water needs; choose for your actual setup.

Fish for Planted Aquariums

Fish for Planted Aquariums

Compare fish, shrimp and other planted-setup choices. Match habitat, plant disturbance, adult space and companions; some need brackish water or land access.

Schooling Fish

Schooling Fish

Compare shoaling and group-living fish, from tetras and rasboras to cory catfish. Plan species-specific groups, adult space and feeding before ordering.

Frequently asked questions

Yes. Both common names refer to Danio margaritatus, originally described as Celestichthys margaritatus. Confirm the scientific name on the particular listing before buying.
Check the exact fish offered, sale unit and current availability. Ask about the food and water the fish are accustomed to, and plan the group before ordering.
Do not assume that capacity makes it suitable. Seriously Fish recommends a base of at least 45 by 30 cm; assess that footprint, planting, group size and any other residents together.
Shrimp survival cannot be guaranteed, particularly for very small young shrimp. Check their separate water and feeding requirements and provide cover; a small fish is not automatically shrimp-safe.
Decide from the aquarium's measured temperature over time. The cited species profile gives 20–26°C as a screening range; a warm room or summer day does not prove that the tank stays suitable overnight or in winter.

Sources & further reading

Material factual claims cite the sources below; store policy and cautious inference are labelled in the article. Sources are grouped by type so you can judge their weight at a glance.

Peer-reviewed study (1)

  1. [2]
    Roberts, T. R. (2007). The 'celestial pearl danio', a new genus and species of colourful minute cyprinid fish from Myanmar. Raffles Bulletin of Zoology 55(1):131–140. View source

    Original description under Celestichthys; identity and locality evidence, not an aquarium-care experiment.

Scientific database (2)

  1. [1]
    GBIF Backbone Taxonomy: Danio margaritatus (Roberts, 2007). GBIF Secretariat. View source

    Accepted taxon record checked against the GBIF name-matching service; not a source for aquarium minimums or sale-stock identity.

  2. [3]
    Danio margaritatus. FishBase. View source

    Scientific species record for 2.1 cm standard length; not a captive lifespan or compatibility study.

Animal-welfare charity (1)

  1. [5]
    Choosing an aquarium for pet fish. RSPCA. View source

    General aquarium preparation and stability guidance; not species-specific water parameters.

Hobbyist reference (1)

  1. [4]
    Danio margaritatus — Celestial Pearl Danio. Seriously Fish. View source

    Species-focused aquarium guidance: 45 by 30 cm base, 20–26°C screening range, group behaviour, planting and food.

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Evidence-led aquarium editorial team

The Tropical Fish Co editorial team compiles care guidance from the sources cited on each page, separates published evidence from practical husbandry policy, and checks retail links against the current catalogue. First-hand experience is included only when a named contributor and the observation have been verified.

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