SURFIN' SAFARI
'(<a href="http://www.j-archive.com/media/2009-10-08_J_12.jpg" target="_blank">Jimmy of the Clue Crew shows some fin models on the monitor.</a>)  Surfboards once used boat rudders as fins; the first <a href="http://www.j-archive.com/media/2009-10-08_J_12a.jpg" target="_blank">high-aspect-ratio fin</a> was created in the '60s using a template from the <a href="http://www.j-archive.com/media/2009-10-08_J_12b.jpg" target="_blank">tail fin</a> of <a href="http://www.j-archive.com/media/2009-10-08_J_12c.jpg" target="_blank">this</a> colorful fish'
a bluefin tuna