Potamosilurus coatesi
Potamosilurus coatesi, or Coates' catfish, 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, more commonly reaching an SL of. Its maximum known weight is.
The diet of Potamosilurus coatesi includes Macrobrachium prawns, aquatic insects and worms, detritus, bark, seeds and bony fish such as Ophieleotris aporos. It has been recorded spawning all year round.