Pearl danio
Small tropical freshwater fish with an iridescent sheen.
The pearl danio is a small, ray-finned fish native to Southeast Asian streams. It features an iridescent body and is popular in home aquariums due to its hardy nature and striking appearance.
- Grows to a maximum length of 2.6 inches.
- Found in clear rivers and hill streams.
- Females have two pairs of barbels.
- Golden shop varieties are semi-albino fish.
- Lives for around five years.
What it is
This tropical ray-finned fish belongs to the family Danioinidae. It displays a brownish-yellow, pink, or silver body with an iridescent sheen. Two light stripes, which may appear yellow, white, blue, or red, run along its sides. The species reaches a maximum length of 2.6 inches. Female fish possess two pairs of barbels, which are sensory whiskers near the mouth.
Where it lives
Native populations originate from Sumatra, Myanmar, Thailand, and Vietnam, including Phu Quoc Island. In the wild, these fish inhabit the surface layers of small, clear rivers and hill streams. They thrive in tropical climates where water hardness ranges from 5 to 19 dGH. The preferred pH level sits between 6.0 and 8.0, with temperatures maintained between 68 and 77 degrees Fahrenheit.
How it lives
Their diet consists primarily of exogenous insects and zooplankton found near the water surface. These small fish live for approximately five years. They are adapted to life in clear, flowing waters where they can spot food items easily. Their iridescent coloring likely helps them blend into the shimmering surface of their natural stream habitats while avoiding predators.
Breeding and life cycle
The pearl danio reproduces by laying eggs. Specific details on spawning seasons or courtship rituals are not provided in the available data. As egglayers, the females release ova into the environment where fertilization occurs externally. This reproductive strategy is common among many small freshwater fish species in tropical regions.
Fish and people
Fish-keeping hobbyists frequently keep this species in home aquariums. Its small size and hardy nature make it suitable for captive environments. Shops often sell golden varieties, which are actually semi-albino forms of the standard fish. These captive-bred color morphs are prized for their unique appearance compared to the wild-type iridescent specimens.
Questions people ask about Pearl danio
What does a pearl danio eat?
In the wild, their diet consists mostly of exogenous insects and zooplankton. These small food sources are typically found near the surface of the clear rivers and streams where the fish live.
How big do pearl danios get?
This species grows to a maximum length of 2.6 inches, which is approximately 6.6 centimetres. Their small size makes them suitable for various aquarium setups.
Are golden pearl danios a different species?
No, the golden varieties often seen in shops are not a separate species. They are in reality semi-albino fish, which lack some of the normal pigmentation found in wild types.
Good reading and sources
The facts on this page come from the Wikipedia article "Pearl danio", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
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