Big catches, anyone? Fishermen are known for their exaggerated tales regarding big catches, but there is truth to catching a Wels catfish with a monstrous weight of over 280 pounds. This happened down the Po River. Catfishes size usually range from inches to feet, but Wels were reported to reach up to 15 feet long. In fact, the biggest Wels measured range from 300 pounds to 660. It’s not every day that you hear stories about big creatures caught in the wild, so here is the list of 7 biggest Wels catfish ever caught.