Shark Migration Video Taken Off Florida

Video taken by Dr. Stephen Kajiura shows blacktip sharks in their migration back to the north as water warms up.

Dr. Kajiura took the video at Palm Beaches and will help studies of sharks' movements.

There were more sharks right behind the ones shown in the video.

These blacktip sharks were close to the beach, but they avoid humans, so swimmers have little to worry about.

Click for details.