Several hundred sharks were spotted off the coast of Miami, Florida, on Monday. [fbvideo link=»https://www.facebook.com/7NewsMiami/videos/10153242608872613/?pnref=story» width=»500″ height=»400″ onlyvideo=»1″] They swam along the shore, approximately 50 meters. Doctor of Science Mahmud Shwiji said that this is a mass migration of sharks that occurs twice a year:...