The wells catfish is the largest European freshwater
fish. Valued as a good eating fish, they can reach 10 feet in length and
weigh hundreds of pounds. They eat fish and surface animals and have even
been accused of attacking small children.
The Upside-Down Catfish, which lives in the Nile in Africa, often relaxes while swimming
belly-up.
The Encyclopedia of Southern Culture gives
catfish their own article which begins "Southerners have never aligned
themselves as closely with any cold-blooded creature as they have with
the feline-looking catfish."
The glass catfish is mostly transparent and
often seen in aquariums. Catfish are also included in aquariums as scavengers,
to help keep the tank clean.
The candiru, a small, worm-like South American
catfish is the only vertebrate parasite of people. Perhaps the less said
about this blood-sucking fish, dubbed Urinophilus diabolicus by one imaginative
observer, the better.
There is a family of catfish which have developed
air-breathing organs. One species is even known to migrate across land.
Other interesting adaptations of catfish include poisonous barbs and the
ability to live in caves.