The cold weather isnt the only thing keeping South Florida swimmers out of the Atlantic Ocean. This week thousands of blacktip and spinner sharks were filmed .\r<br>\r<br>Shark sightings video: Thousands of sharks spotted migrating off Florida coast.\r<br>\r<br>WPTV in Florida reports beaches in the Palm Beach area are closed, because thousands of sharks are swimming off the coast. NOTE: Video is silent. (March 6)\r<br>\r<br>\r<br>\r<br>Migrating sharks, right off the Breakers Hotel.
