Dear Bob,
  Donna and Riley Black were shrimpers working the entire Gulf of Mexico.
During the off sason they decided to do some shell dredging. They did and
sold the dredging by the bushelful. A lot of good things came up in the
dredgings. There are many out there who can tell you more, but that is the
basics.
 P.S. Haven't gotten to your private questions yet. will do so soon.
       Carole M