PlanetCatfish.com

In a book I got a few weeks ago, it says that catfish and knifefish are in the same order (but different suborders). Is this true? This edition of the book was printed this year, so the information must be fairly new. Not really much else to say, so here's a picture.



BTW: The book is called "Encyclopedia of Fishes".

That's a typo.

The "suborder Gymnotiformes" should be "order Gymnotiformes", as the "-iformes" suffix denotes an order (suborders have "-oidei" suffixes; if it was a suborder, it would have been Gymnotoidei).

In older literature, knifefishes (Gymnotoidei) and catfishes (Siluroidei) are considered suborders of the carps (Cypriniformes).