http://www.lib.noaa.gov/retiredsites/japan/aquaculture/proceedings/report28/Yada.pdf "Relationship between external and internal morphological changes and feeding habits in the fry state of Japanese Catfish Silurius Asotus"] , 1999, Osamu Yada and Atsushi Furukawa, UJNR Aquaculture 28th Panel Proceedings This species grows to 130 cms in total length.