Squaliformes

order of fishes Squaliformes (Squaliformes) is an order comprising closely related families of organisms. It contains 7 families with 120 known species. Key family groups include Centrophoridae, Dalatiidae, Echinorhinidae, Etmopteridae, Oxynotidae, and Somniosidae. Among its members, 24 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Elasmobranchii (Elasmobranchii).