Neoarius coatesi, or Coates' catfish,[1] is a species of catfish in the family Ariidae. It was described by Patricia J. Kailola in 1990, originally under the genus Arius. It is endemic to Papua New Guinea, being only known from the Sepik and Ramu Rivers. It reaches a maximum standard length of 75cm (30inches), more commonly reaching an SL of 45cm (18inches). Its maximum known weight is 5kg (11lb).
The diet of Neoarius coatesi includes Macrobrachium prawns, aquatic insects and worms, detritus, bark, seeds and bony fish such as Ophieleotris aporos.[2] It has been recorded spawning all year round.[3]