Fact sheet, with photograph.
Fact sheet, focused on the occurrence of this fish in the U.S. Great Lakes. Includes an image.
Introduction to Family Siluridae, the catfish, with particular focus on the species Silurus glanis, the European Wels Catfish. Covers distribution, behaviour, sexual differences, and spawning. Includes photos.
About the Callichthyidae family, or armored catfish, with more than 50 species native to the streams of South America, including genus Pterygoplichthys. Some are now found in Florida. These fish are known to "walk" on land using their pectoral fins.
Information about three species in Minnesota.
Discussion and photos of this introduced nonindigenous species in Florida.
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