Espei Rasbora

The Espei Rasbora (Trigonostigma espei) is a peaceful, schooling fish native to Thailand and Cambodia. Growing to about 3 cm (1.2 inches), it is slightly smaller and more slender than the common Harlequin Rasbora. Its body is a rich copper-orange, featuring a distinct black “lambchop” shaped wedge on the rear half. It is an excellent community fish that schools tightly and brings a warm, metallic glow to planted aquariums. Now in stock

Category: Fishes

Description

1. Origin & Identification

Scientific Name: Trigonostigma espei.
Common Names: Espei Rasbora, Lambchop Rasbora, False Harlequin.
Origin: Native to peat swamp forests and streams in Thailand and Cambodia.
Difference from Harlequin Rasbora:
- Harlequin: Taller body, pinkish color, large triangular black patch.
- Espei: Slimmer body, intense copper/orange color, narrower black patch that looks like a lamb chop or a hockey stick.

2. Appearance

Color: The body is a metallic bronze or copper-red that glows under aquarium lights.
Markings: The signature black wedge starts mid-body and narrows as it reaches the tail, bordered by a glowing orange outline.
Size: A true nano fish, reaching a maximum of 3 cm (1.2 inches).

3. Temperament & Behavior

Schooling: These are very tight schoolers. Unlike some tetras that drift apart, Espei Rasboras often swim together in a coordinated pack. You should keep at least 6 to 8, but a group of 12+ creates a stunning “fire-ember” effect.
Peaceful: They are completely harmless and make perfect tank mates for other small fish like Corydoras, Tetras, and Shrimp (though they may eat tiny baby shrimp).
Activity: They occupy the middle and upper levels of the tank.

4. Aquarium Care

Tank Size: Minimum 10 gallons.
Water Parameters:
- Temperature: Tropical, 23°C – 28°C (73°F – 82°F).
- pH: 6.0 – 7.5. They prefer slightly acidic water to show their best colors.
Decor: They look best in tanks with live plants and dark substrate. The green plants contrast beautifully with their copper bodies.

5. Diet

Omnivores: They are not picky.
Food: High-quality flakes, micro-pellets, and frozen foods like cyclops or daphnia. Their mouths are small, so ensure the food particles are appropriately sized.

6. Breeding

Method: Unlike many fish that scatter eggs on the floor, Trigonostigma species stick their eggs to the undersides of broad leaves (like Cryptocoryne or Anubias).
Difficulty: Moderate. They require soft, acidic water and plenty of live food to trigger spawning.