A thoughtful student of mine came back from a cruise to the Bahamas and brought me a souvenir gift: a wood-carved shark done up in segments and affixed to a soft "spine" that allows the shark to flex and undulate when handled. Nifty. Here are two pictures.
Pretty awesome, eh? He's a good kid, this student.
[A bit of trivia: Hai is Japanese for "yes," but also German for "shark."]