Narwhals, Monodon monoceros, are toothed whales that live mostly in Arctic coastal waters and inlets. Male and female narwhals only have two teeth, which are both in the upper jaw. The male’s iconic, ...

The term “narwhal” is Scandinavian and means “corpse whale”, which refers to the creature’s mottle grey-black skin colour – the colour of a corpse. In fact when they are born ...

"We're riding the back of a narwhal for days with this technology and it's just astounding to me," she told BBC News. M P Heide Jorgensen The tags attach with a suction cup to the whales' backs ...

Writing on Facebook, Ms Steffen said Narwhal, named after a species of whale that has a single large "tusk", had visited the vet on Tuesday. And X-rays had showed his secondary tail, about a third ...