Sharks primarily live in saltwater, but some species can be found in brackish and freshwater.
Sharks and rays (Elasmobranchii) are a subclass of the cartilaginous fishes ( (Chondrichthyes). The species in this subclass have jaws, paired fins and nostrils, a heart with its chambers in series, and skeletons made of cartilage rather than bone.
The North Sea is the habitat of several shark species, of which the descriptions can be found following the links mentioned below.
- Angel shark (Squatina squatina)
- Basking shark (Cetorhinus maximus)
- Blue shark (Prionace glauca)
- Common smooth-hound (Mustelus mustelus)
- Nursehound (Scyliorhinus stellaris)
- Porbeagle (Lamna nasus)
- Small-spotted catshark (Scyliorhinus canicula)
- Spiny dogfish (Squalus acanthus)
- Starry smooth-hound (Mustelus asterias)
- Tope shark (Galeorhinus galeus)
- Tresher shark (Alopias vulpinus)