Order : Cypriniformes
Family : DANIONIDAE
Species : Luciosoma setigerum

Standard Length (excludes tail fin) : to 26 cm
(Fishbase, 2026)

The genus Luciosoma comprises just 5 species of streamlined, fast-swimming fishes all of which occur in Southeast Asia (Fishbase, 2026).

Luciosoma setigerum (Apollo Shark-minnow) is a pelagic predator of larger streams and rivers, with a tolerance of variable water conditions including rapids.

Reaching a maximum of 26 cm in length (excluding the tail), it can be identified by the single, dark lateral row of spots along the flank which merge and thicken posteriorly into a thick black band which extends along the upper lobe of the forked tail fin. A narrower, unconnected dark band runs along the lower lobe of the tail fin. 

The diet of Luciosoma setigerum mainly comprises other fish, but probably also insects which have fallen into the stream or river.

Luciosoma setigerum occurs in various river drainages of Southeast Asia, particularly those of Peninsular Malaysia.

Figs 1 and 2 : Two examples of Luciosoma setigerum at Sungai Tahan, Taman Negara, Peninsular Malaysia.

Fig 3 : Turbulent, fast-flowing riverine habitat at Sungai Tahan, Taman Negara, Peninsular Malaysia.


References and links :

Fishbase - Luciosoma setigerum