Istiophoriformes

Istiophoriformes are an order of bony fish which is not fully recognized by some taxonomists. Some include the two extant families Xiphiidae and Istiophoridae, and others include the family Sphyraenidae.

 Families 
The following families are classified under the Istiophoriformes. Three are extant, and three are extinct:
 Sphyraenidae (barracudas)
 Xiphiidae (swordfish)
 Istiophoridae (marlins, spearfish and sailfish) 
 †Hemingwayidae
 †Palaeorhynchidae
 †Blochiidae


 References 
 "Istiophoriformes". Encyclopedia of Life. Retrieved 10 May 2018.