Glowlight Rasbora (Trigonostigma hengeli)

The Glowlight Rasbora, also known as the Lambchop Rasbora, is a beautiful small schooling fish known for its glowing orange stripe and distinctive dark markings.

Peaceful, active and easy to keep, these little Rasboras are an excellent choice for planted, nano and peaceful community aquariums. They look particularly impressive when kept in a large school against lush green plants and a darker background.

Quick Facts

• Scientific Name: Trigonostigma hengeli
• Common Name: Glowlight Rasbora / Lambchop Rasbora
• Origin: Southeast Asia
• Adult Size: Approximately 3cm
• Diet: Omnivore / Micropredator
• Temperature: 23–28°C
• pH: 5.0–7.5
• Temperament: Peaceful
• Minimum Group Size: 6+
• Tank Level: Mid to Upper Water
• Sex: Unsexed

Overview

Glowlight Rasboras are peaceful, social and active schooling fish that really come into their own when kept in a good-sized group.

While a group of 6 should be considered the minimum, keeping 10 or more where space allows creates a much more impressive display and encourages confident, natural behaviour.

Their bright orange colouration contrasts beautifully against green plants, making them an especially popular choice for planted and aquascaped tanks.

Behaviour & Compatibility

Glowlight Rasboras have a gentle and peaceful temperament, making them ideal for communities containing other small, non-aggressive species.

Suitable tankmates can include:

• Small Tetras
• Other peaceful Rasboras
• Pygmy Corys
• Corydoras
• Otocinclus
• Small peaceful Gouramis
• Kuhli Loaches
• Adult dwarf shrimp

Very small shrimp fry may potentially be eaten, but adult dwarf shrimp are generally suitable tankmates.

Avoid keeping them with large, aggressive or highly boisterous fish that may intimidate or prey upon them.

Aquarium Setup

Glowlight Rasboras look fantastic in a well-planted aquarium with plenty of cover around the sides and back while leaving open areas for schooling.

A darker substrate and background can really help their orange colouration stand out, while floating plants can provide shaded areas and help the fish feel secure.

Driftwood, leaf litter and botanicals can also be used to create a more natural Southeast Asian-style setup.

Good filtration, regular water changes and stable water parameters will help keep them healthy and displaying their best colour.

Feeding

Glowlight Rasboras have small mouths, so appropriately sized foods are important.

A varied diet can include:

• Quality micro pellets
• Fine or crushed flakes
• Baby brine shrimp
• Daphnia
• Small bloodworms
• Other appropriately sized frozen or live foods

A good-quality varied diet will help promote strong colour, healthy growth and active behaviour.

Why We Love Them

Glowlight Rasboras are a fantastic choice for anyone wanting a small, peaceful schooling fish with plenty of colour.

Their glowing orange stripe becomes particularly impressive when a large group moves together through a planted aquarium.

They're peaceful, attractive and small enough to work beautifully in many community setups.

For the best display, keep them in a group of at least 6 — although 10+ looks even better where space allows.

Product photos are for reference only. As these are live fish, exact size, colour and markings may vary between individuals.