Robbie commented:

> I have a vision of a startled dentist, who is staring at a mouthful
> of teeth arranged like the black & white piano keyboard!  -- Robbie

And I have the vision of a fish whose teeth are so arranged.  I think it
is called a piano tuna.

Bill Maxim

 [ That's it!  A simple musical form invented by Humphrey Bogart and/or
 [ Chico Marx: "Play another tuna on the pianna!"  ;)   -- Robbie