Britannica
Sources used in this answer
Which ostariophysan order contains electric eels?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
ostariophysan
Knifefish, or featherback (Xenomystus nigri)
Electric eels belong to the order Gymnotiformes.12
While they are commonly called "eels," they are not true eels; rather, they are a type of knifefish related to other ostariophysan groups such as characins and catfishes. Members of the order Gymnotiformes are characterized by their elongated bodies, long anal fins, and the presence of electric organs.32