Down under danger

Up until today, I had never heard of this maritime creature, the cone snail. Maybe I resided too far below the tropical zone (in northern New South Wales) to meet up with this fellow.

This video surprises me. Are they exaggerating in suggesting that you might encounter such a nasty creature while paddling around in shallow rock pools on the edge of the water? When I was a kid at the beach (mainly at Yamba or Woolgoolga), nobody ever warned me about the possible dangers of picking up pretty seashells. The only notorious enemy that frightened everybody was the shark. I never saw too many sharks, but I often got stung by creatures we referred to as jellyfish.