Squaliformes
From Conservapedia
Squaliformes | |
---|---|
Scientific classification | |
Kingdom Information | |
Domain | Eukaryota |
Kingdom | Animalia |
Subkingdom | Biliteria |
Branch | Deuterostomia |
Phylum Information | |
Phylum | Chordata |
Sub-phylum | Vertebrata |
Infraphylum | Gnathostomata |
Class Information | |
Class | Chondrichthyes |
Sub-class | Elasmobranchii |
Order Information | |
Superorder | Selachimorpha |
Order | Squaliformes |
Family Information | |
Families | Echinorhinidae Squalidae Oxynotidae Centrophoridae Etmopteridae Somniosidae Dalatiidae |
Population statistics |
Squaliformes is an order of sharks representing 7 families and 113 species of shark, with the spiny dogfish (Squalus acanthias) possibly the most abundant fish of any kind in the world's oceans. They are characterized by a lack of an anal fin, and range in size from 7.5 inches (Dwarf lanternshark, Etmopterus perryi) to 21 feet (Greenland shark, Somniosus microcephalus).