Cryptarius is a genus of catfishes (order Siluriformes) of the family Ariidae. It includes two species, C. daugeti and C. truncatus. Cryptarius species originate from brackish waters of south and southeast Asia.C. daugeti originates from the Mekong River basin and inhabits large rivers. It is found in brackish and fresh waters of Cambodia and Vietnam. This species has a maximum length of 26 centimetres (10 in) TL.C.