Answer:
The ones in the sea are prickly, but the ones on the street might pickpocket you.
What goes in the water black and comes out red?
What animal has feet on the head?
What has armor but is not a knight, snaps but is not a twig, and is always at home even on the move?
You're gonna need a bigger boat to go after one of these toothy hunters.
When is it bad luck to see a black cat?