A narwhal has a tooth,(actually,two of them).It is an protruding tooth whose exact function is not clearly known.There is anecdotal information that it is used in defense,or for digging up food in the sediment,or for attracting a mate.Both males and females have these teeth,but in females it never grows out much.Sometimes there are two tusks on a narwhal,with both teeth extending.Usually one is longer..The ivory is very pretty ,with a sort of glow.The tusk can reach 8 feet long and can be 3 inches round at the base.
Stacy
Blade shown has narwhal handle and spiral forged ,three sided blade.