| The squaliformes, or dogfish sharks, are a large and varied group that contains seven families and comprises at least 94 species. They are found in all oceans at depths up to 20,000 feet (6,000 m). Most occur in deep water on the slopes of continents and islands, but some inhabit temperate inshore waters, and a few range as far as the Arctic and Antarctic regions. All have two dorsal fins (either spined or spineless) no anal fin, cylindrical bodies, short to moderate snouts and five pairs of gill openings. many have powerful cutting teeth in both jaws. |
