Other Names: Lambchop Rasbora, False Harlequin, Narrow Wedge Harlequin.
The Espe’s Rasbora Trigonostigma espei (previously Rasbora espei) is yet another amazing aquarium fish from Southeast Asia. It is a relative newcomer, described by Meinken as recently as 1967. This fish is found throughout the eastern slopes of the Gulf of Thailand in Cambodia and Thailand, and more recently, a population has been found on the Island Phu Quoc of Vietnam.
This fish is often confused with two of its close relatives, the Harlequin Rasbora Trigonostigma heteromorpha and the Glowlight Rasbora Trigonostigma hengeli. The name 'Espe’s Rasbora' is also often mis-applied to the Hengel’s Rasbora, and both fish are frequently sold under the name of 'False Harlequin' as well.