Max Size: 6.5cm

Pearl Danio (Danio albolineatus, Brachydanio albolineata)

The Pearl Danio is a great beginner fish and ideal for most community aquariums as they are peaceful and pretty adaptable regarding their water parameters. Unfortunately, these Danios are highly underrated and are often overlooked by many hobbyists.

Pearl Danios are a naturally shoaling species; therefore, they do better when kept in groups of 6 or more individuals. Depending on your aquarium size and stocking levels, try to keep the most number of these fish possible.

Individuals within large groups of Pearl Danios will continually chase and interact with one another; this is part of their natural social communications, but don't worry, injuries from these behaviours rarely occur.

If you keep these fish in numbers less than five, the playful chasing seen in larger groups may become stressful for the less dominant individuals. When kept singly, these Danios may become nervous and hover in the top corners of the aquarium.

Tankmates for Pearl Danios are not much of a problem as you can combine them with most other fish in the aquarium hobby. For example, you can house them with medium-sized Cyprinids, Tetras, Livebearers and Rainbowfish, Anabantoids, Catfish and Loaches. You can also use Pearl Danios as a dither fish for many smaller, less aggressive Cichlids, such as Kribensis, Keyhole Cichlids and Flag Acaras.

Due to their high activity levels and shoaling nature, you should not maintain Pearl danios in any less than 75 litres aquarium. The larger the aquarium, the better, and these Danios thrive in standard aquariums ranging from 110 to 285 litres.

Pearl Danios have a pearl-like sheen on their bodies, and healthy fish often show various beautiful colour schemes. Most individuals possess an iridescent pink or purple body and a yellow or neon-orange stripe that runs down one-third or more of the body length to the caudal fin. These Danios also have yellow or neon-orange eyes, hints of olive on the body, and subtle hints of yellow in their fins.


Pearl Danio
Pearl Danio
Pearl Danio
Quick Facts
Scientific NameDanio albolineatus, Brachydanio albolineata
Other NamesNone
OriginsCambodia, Indonesia, Laos, Malaysia, Myanmar, Thailand, Vietnam
Aquarium LevelMiddle - Top
Best kept asGroups 6+
Lifespan3 - 5 years
Water Parameters
Water TypeFreshwater
PH6.0 - 8.0
GH5 - 19
TDS18 - 357
60 - 77℉
15.6 - 25℃


In the home aquarium, the Pearl Danio will readily accept most good quality dried foods such as granules, flakes and sinking pellets. These modern food products have been developed to provide all adequate nutrition to maintain your fish's health and dietary requirements.

Providing additional foodstuffs such as live, frozen, and freeze-dried meals such as bloodworm, daphnia, and tubifex once or twice a week will provide additional benefits to your fish's health and well-being but is not a must for this fish.

It should be noted that bloodworms should only be given as an occasional treat and should not be used as the staple diet as they are difficult for fish to digest and can potentially cause blockages.

This fish is an omnivore in the wild, meaning it will consume some vegetable matter. Although most modern fish foods take this into account and include them in their products, you can still supplement your fish's diet with blanched vegetables such as spinach, broccoli, and zucchini. Ensure you do not overfeed your fish and remove any leftovers the following day.

Sexual Dimorphism

It is quite simple to differentiate between the male and female Pearl Danio. Sexually mature females usually are a little larger, rounder-bellied and slightly less colourful than males. The differences are particularly

clear when the adults are in spawning condition as the males intensify in colour and the female's stomach will fill with eggs.

The Pearl Danio has been featured on the following stamps

Vietnam - 1987