Lake Inle Danio: A Comprehensive Guide (Inlecypris auropurpureus)

March 13, 2026

The Lake Inle Danio (Inlecypris auropurpureus) is a peaceful and active schooling fish native to the unique waters of Lake Inle in Myanmar. Known for its shimmering body and subtle purple-gold tones, this species has become popular among aquarists who appreciate unusual schooling fish and biotope aquariums.

Unlike many common danios, the Lake Inle Danio belongs to the genus Inlecypris, a group of cyprinid fishes closely associated with the distinctive ecosystem of Lake Inle. In aquariums, these fish are appreciated for their constant activity, gentle temperament, and ability to thrive in planted community tanks.

When kept in proper groups, they display attractive schooling behavior and add movement and life to the middle regions of the aquarium.

Natural Distribution & Habitat

Inlecypris auropurpureus is endemic to Lake Inle, a large highland lake located in Shan State, Myanmar. The lake sits at an elevation of roughly 900 meters (about 3,000 feet) above sea level and supports a unique ecosystem with many endemic fish species.

The natural habitat of Lake Inle Danios includes:

Shallow vegetated areas of the lake
Slow-moving streams feeding into the lake
Channels between floating gardens
Areas with submerged plants and roots

The water in Lake Inle is typically clear, well-oxygenated, and moderately cool compared to many tropical fish habitats. Dense aquatic vegetation provides shelter and feeding grounds for small schooling fish like Inlecypris auropurpureus.

Because of this environment, Lake Inle Danios are accustomed to living among aquatic plants and open swimming areas where they can form loose schools.

Size

Lake Inle Danios remain relatively small, making them excellent candidates for peaceful community aquariums.

Typical adult size:

Length: 1.5–2 inches (4–5 cm)

Their small size and active swimming behavior make them well suited for planted aquariums where they can move freely through the midwater.

Aquarium Care

Lake Inle Danios are hardy fish that adapt well to a variety of aquarium conditions when provided with good water quality and plenty of swimming space.

Recommended aquarium setup:

Tank size: 15–20 gallons minimum
Aquascape: Planted aquarium with open swimming areas
Substrate: Sand or fine gravel
Lighting: Moderate lighting

Plants such as Vallisneria, Cryptocoryne, Java fern, and stem plants help replicate their natural environment. Floating plants can also help diffuse lighting and make the fish feel more secure.

Because they are schooling fish, they should be kept in groups of at least 6–8 individuals, though groups of 10 or more tend to display more natural behavior.

A gentle current and good filtration help mimic the oxygen-rich waters of their natural habitat.

Water Parameters

Lake Inle Danios prefer slightly cooler water compared to many tropical aquarium species, reflecting the highland environment of Lake Inle.

Recommended parameters:

Temperature: 68–75°F (20–24°C)
pH: 6.5–7.5
Hardness: Soft to moderately hard water (3–12 dGH)

They can tolerate slightly warmer temperatures, but they tend to show their best behavior and coloration in the cooler end of this range.

Stable water quality and regular water changes are important for maintaining healthy fish.

Diet

In the wild, Lake Inle Danios feed on small invertebrates, zooplankton, and organic material found among aquatic plants.

In the aquarium they readily accept a wide range of foods, including:

High-quality flake food
Small micro pellets
Frozen foods such as daphnia, cyclops, and baby brine shrimp
Live foods like microworms or brine shrimp

Providing a varied diet helps maintain their health and enhances their natural coloration.

Behavior & Tank Mates

Lake Inle Danios are peaceful, energetic schooling fish that do very well in community aquariums.

Suitable tank mates include:

Small rasboras
Other peaceful danios
Small tetras
Corydoras catfish
Hillstream loaches
Small gouramis

Because they are active swimmers, they are best kept with fish that appreciate similar water movement and open swimming space.

They typically occupy the middle and upper regions of the aquarium and are constantly in motion, making them a lively addition to planted tanks.

Breeding

Like many small cyprinids, Lake Inle Danios are egg scatterers that spawn among plants.

In breeding conditions:

Eggs are scattered among fine-leaved plants or spawning mops
Adults do not guard the eggs and may eat them
Eggs usually hatch within 24–48 hours

Fry are very small and initially require microscopic foods such as infusoria before moving on to baby brine shrimp.

In well-established planted aquariums, occasional fry may appear if the tank provides enough cover for the eggs and young fish to avoid predation.

Why Aquarists Love Them

Lake Inle Danios are appreciated by aquarists who enjoy peaceful schooling fish that are slightly different from the typical community species.

Reasons hobbyists enjoy this species include:

Beautiful subtle coloration with purple and gold tones
Peaceful temperament ideal for community aquariums
Constant active swimming behavior
Compatibility with planted tanks
Interesting connection to the unique ecosystem of Lake Inle

For aquarists interested in fish from unusual habitats or those building Southeast Asian biotope aquariums, the Lake Inle Danio is a fascinating and attractive species.

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