The most common ones in norwegian waters (in no particular order);
Blackmouth catshark (Lives near the bottomn, usually 55-1200 meters)
Velvet belly lantern shark (Deep waters, down to 500+ meters)
Spiny dogfish (Ocean down to 400 meters)
Small-spotted catshark (10-400 meters)
Greenland shark (First real big one with up to 7-8 meter length, lives at 200-600 meters tho)
Porbeagle (up to 3m long, 0-200 meters depth)
School shark (up to 2m long, Down to 550m depth)
Basking Shark (usually 8-10 meters but up 14.. Related to and feed like the whaleshark)
We also have some species dropping by every now and then, but these are the most common to be seen here, so I guess the answer is generally "below recreational depths"?