I have heard a very strange fishy tale about one of these. There is a man down in Norfolk who keeps Koi in a landscaped river, about 300,000 gallons. Now he also has all kinds of fancy wild foul including Black Swans etc. Now he had heard of one of these monsters reported to be 9 1/2 feet long emerging from the depths and swallowing a Swan whole, very scary!CFC said:No thats not a Wallago attu, thats a Silurus glanis, the Wels catfish which is a coldwater European native. This is another catfish in the compettition for the worlds largest freshwater fish, some specimins have been reported as being seen at over 10 feet long!