Have you heard of Mexican jumping beans? Well, I got a video of Gulf of Mexico jumping cockles. They look like fish jumping at first but when you do a double-take..... it's a big shell! These are live COCKLE SHELLS moving around at low tide. Check out the one eating the PEAR WHELK.....or is it the other way around? http://www.youtube.com/watch?v=6TjNYOG9AB8 …