Here are some Direct links to Catfish sites including the Catfish study Group, & sites of quality that are run by some of my friends.
The Catfish Study Group. Has a world wide membership and is dedicated to promoting the interest and furthering the knowledge of Catfish
Corydoras World. A most informative site about Corydoradinae species of South American Catfishes. Including a member only section.
Scotcat. A UK based dedicated Catfish website catering to the needs of the ever growing population of Catfish lovers. With an active forum, this is another must for your favourites folder.
Planet Catfish. One of the worlds premier All Species Catfish site . The development of the site over ten years has been phenomenal, making it a place to visit for Catfish information. As well as the vast amount of available written and pictorial information, the site boasts one of if not the best Catfish forums available on the web with many of its members experts in their own rights.
CORY DK. A good Corydoras catfish informative site for Danish speakers,