Noun
an order of fish belonging to the superorder Malacopterygii including catfishes
Source: WordNetCharaciformes forms a group known as Characiphysi with Siluriformes and Gymnotiformes. Source: Internet
Characiformes is the sister group to the orders Siluriformes and Gymnotiformes, though this has been debated in light of recent molecular evidence. Source: Internet
Some place Gymnotiformes as a sub-order of Siluriformes, however this is not as widely accepted. Source: Internet