Protacanthopterygii

Procanthopterygii is a superorder of teleost fishes.^[1] These fish mostly live in temperate waters, and in the northern hemisphere. They may live in both fresh and salt water.

Protacanthopterygii
Ayu (Plecoglossus altivelis: Osmeriformes) in Kawasaki (Kanagawa Prefecture, Japan)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Clade:	Euteleostei
Superorder:	Protacanthopterygii
Orders
Argentiniformes Esociformes Galaxiiformes Salmoniformes Osmeriformes? Stomiiformes?

Best-known examples of this group are the salmon, trout, and pikes.

The main groups are:

• Argentiniformes
• Esociformes
• Osmeriformes
• Salmoniformes