These catfish originate from the Mekong basin, and are reported from Chao Phraya, Mae Klong, and peninsular Thailand river systems.

[3] The caudal fin is white when the fish is small, but it becomes bright red when it reaches about 15 cm (6 in).

[1] Hemibagrus wyckii bears a resemblance to H. wyckioides, however, H. wyckioides lacks serrations on the dorsal fin spine, has a shorter dorsal fin base, and shorter maxillary barbels.

[3] Hemibagrus wyckioides occurs in large upland rivers, and is common in areas with rocky bottoms and irregular depths.

[1][3] These fish do not migrate, but they reproduce locally and enter the flooded forest during high water in July–October.