It looks like an alien creature: a critter with a cone-shaped shell, long arms and tentacles fluttering out of its fleshy opening. It's not from another world, but an ancient one.

Viral TikTok shows woman's panic in Japan after she handled the shell of one of the world's deadliest snails. Cone snails use harpoon-like teeth to inject venom that immobilizes their victims.

The textile cone delivers a deadly combination of chemicals via hollow teeth similar to small harpoons. An underwater photographer spotted the venomous sea snail on the NSW North Coast.