Longest whale tooth
2 metre(s)
Unknown ()

The longest whale tooth is the single (very rarely paired) spiralled ivory tusk of the male narwhal (Monodon monoceros), which, when found washed up with dead narwhals, was once thought to be the horn of the fabled unicorn. Narwhal tusks attain an average length of roughly 2 m (6 ft 6 in), but can occasionally exceed 3 m (9 ft 10 in), and weigh up to 10 kg (22 lb), with a maximum girth of approximately 23 cm (9 in).