Semilabeo obscurus
Semilabeo obscurus is a small cyprinid native to South‑East Asian rivers. It is popular among local anglers for its delicate flesh and active surface feeding, making it a fun target for light‑tackle fishing.
Family
Cyprinidae
Max Size
28.2 cm
Habitat
freshwater
Climate
subtropical
Best Season
Late spring to early autumn (May‑October) when water temperatures are 22‑28 °C
Best Time
Early morning and late afternoon when insects are most active
No distribution map available
Mekong River (Chiang Rai)
ThailandA wide, fast‑flowing stretch of the Mekong where Semilabeo obscurus congregates in deep pools and eddies, especially during the dry season.
Best: November‑February
Red River (Lao Cai)
VietnamClear, cool waters of the Red River near its upper reaches host abundant insect hatch, attracting large numbers of Semilabeo obscurus.
Best: September‑November
Ganges River (Varanasi)
IndiaThe sacred bends of the Ganges near Varanasi provide deep riffles and sandbars where the species feeds on benthic invertebrates.
Best: October‑December
Brahmaputra River (Sylhet)
BangladeshWide, murky sections of the Brahmaputra in the Sylhet region support a thriving population of Semilabeo obscurus during monsoon high‑water.
Best: May‑July
Irrawaddy River (Mandalay)
MyanmarRemote, fast‑moving stretches of the Irrawaddy near Mandalay are known among locals for trophy‑size Semilabeo obscurus, but access is challenging.
Best: March‑May
Mahakam River (East Kalimantan)
IndonesiaTropical lowland reaches of the Mahakam provide deep channels and flooded forest edges ideal for the species during the dry season.
Best: June‑August
Best bait: Live shrimp, mosquito larvae, or small insects