Kryptopterus geminus is described from the Bang
Pakong, Mekong, Mae Khlong and Chao Phraya River drainages
in mainland Southeast Asia. Occurs in large rivers
with turbid waters and in streams and canals.
Description: K. geminus, together
can be distinguished from congeners by the dorsal
profile lacking a nuchal concavity and short maxillary
barbels extending to the base of the pectoral fin.
Kryptopterus geminus can be further distinguished
from K. cryptopterus in having a narrower
head (9.5– 12.0% SL vs. 12.2–14.2), longer
anal fin (62.2–72.7% SL vs. 57.2–62.9)
and snout (39.5–45.3% HL vs. 35.1–39.8),
and more laterally-placed eyes (only ventral half,
vs. ventral two-thirds, of the orbital margin visible
when the head is viewed ventrally). Diet:
Feeds on fish, prawns, insects and their larvae. Reproduction:
Spawns during the early part of the rainy season.
The young move toward the seasonally flooded habitats
and are first seen in August. Remarks:
Often misidentified as K. cryptopterus.
Asia:Mekong, Mae Khlong, Bang Pakong and Chao
Phraya River drainages in mainland Southeast Asia.
Type locality: Cambodia: Stung Treng,Mekong
River 2 km downstream from mouth of Tonle San on sandbars,
Mekong River drainage.
Froese, R. and D. Pauly.
Editors. 2016. FishBase. World Wide Web electronic
publication. www.fishbase.org, ( 01/2016 ).
Kottelat, M., 1998. Fishes of the Nam Theun
and Xe Bangfai basins, Laos, with diagnoses of twenty-two
new species (Teleostei: Cyprinidae, Balitoridae, Cobitidae,
Coiidae and Odontobutidae). Ichthyol. Explor. Freshwat.
Ng, H.H., 2003. Kryptopterus geminus, a new
silurid catfish (Teleostei: Siluridae) from mainland
Southeast Asia. Zootaxa 305:1-11.