Has anyone ever seen a narwhale face to face?

[Lan-shan-po]

What purpose is it's horn, for fighting, domination or spearing food?

[wildwood]

Not face to face, no.

The 'horn' is actually a tooth (tusk) and it is believed that the main purpose is for sensing food. Unlike a normal tooth, the tusk has the sensitive parts outside and the enamel inside. Sometimes it is used for friendly sparring between males in the breeding season. Females have a much shorter tusk. In the occasionally individual both tusks grow.
I can not see them using it to spear food as the animal is too big violently enough too shake it off to eat it.

[wildwood]

I can not see them using it to spear food as the animal is too big to shake violently enough too it get the prey off to eat it.

[wildwood]

Grr... I give up.

[Lan-shan-po]

There's an amazing program on bbc1 called Ocean Giants, unfortunately it's going to finish at 10, but may be able to view online. I seen the narwhale there, amazing creature.

[tiggerblue10]

No idea what use the Narwhal's tusk is but I've really enjoyed watching Ocean Giants. Didn't get to see last night programme but I V+ it so I'll watch it later.