Britannica
Sources used in this answer
Which fish families are included in the order Esociformes?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
protacanthopterygian
Rainbow trout (Oncorhynchus mykiss).
The order Esociformes includes two primary fish families:
- Esocidae: This family comprises the pikes, pickerels, and their allies, represented by a single genus, Esox.1
- Umbridae: This family consists of the mudminnows, which include three genera (Dallia, Novumbra, and Umbra).1
These freshwater fishes are found throughout the Northern Hemisphere and are characterized by features such as the lack of an adipose fin and the absence of a mesocoracoid bone in the pectoral girdle.1