Here you can see several record wels catfish: http://www.fisch-hitparade.de/fischhitparade/all/67-wels_waller.html
Look at the lengths, even the largest ones are "only" in the 2,5m region, and there is also only a handfull of them. This are all extremely exceptional fish. If this species could be really reach 5m, this would be average and not record sizes. The actual largest confirmed specimen of 2,78m and 144kg which was caught at the Po Delta, Italy, can be seen here: http://www.karpfen.ch/html/bigfish/....1&PHPSESSID=87f41b4d026fa15cdc90b407d0f87ef5
An additional note: Even very large fish like this one looks much lesser impressive if there is no forced perspective as it is used for many photos made by anglers and hunters to make their catch looking bigger.
Look at the lengths, even the largest ones are "only" in the 2,5m region, and there is also only a handfull of them. This are all extremely exceptional fish. If this species could be really reach 5m, this would be average and not record sizes. The actual largest confirmed specimen of 2,78m and 144kg which was caught at the Po Delta, Italy, can be seen here: http://www.karpfen.ch/html/bigfish/....1&PHPSESSID=87f41b4d026fa15cdc90b407d0f87ef5
An additional note: Even very large fish like this one looks much lesser impressive if there is no forced perspective as it is used for many photos made by anglers and hunters to make their catch looking bigger.