The Asian redtail catfish is native to Thailand.
Species Profile - Asian Redtail Catfish
These catfish originate from the Mekong basin and are reported from Chao Phraya, Mae Klong and peninsular Thailand river systems.
H. wyckioides reaches a length of 130 centimetres (50 in) TL. This species is the largest Bagrid catfish in Asia and may reach 80 kilograms. The caudal fin is white when the fish is small, but it becomes bright red when it reaches about 15 cm (6 in).
H. 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.