Dramatic video footage has emerged showing an enormous group of sharks in a feeding frenzy off the US coast . Video taken from high up on an oil platform captured hundreds of the predators circling 30 miles from the shores of Grand Isle , Louisiana . Exerts believe the sharks were following shoals of fish and migrating to warmer waters after a winter in the south . The footage was taken by a worker on an oil platform 70ft above the surface and shows the massive gathering as the camera pans from left to right . Marine biologist and film maker Ellen Husain told MailOnline that the sharks are likely to have been spinners , found in the Gulf of Mexico , and known for migrating north in large numbers up the Florida coast at this time of year . She added : 'You can also get a few other sharks mixed in with them , like hammerheads and blacktips . ' Shark infested waters : Hundreds of the predators were spotted circling in the waters off Grand Isle , Louisiana . Feeding frenzy : Exerts believe the predators were following shoals of fish and migrating to warmer waters after a winter in the south . Circling : The dramatic footage was taken by a worker on an oil platform 70ft above the sea 's surface .
Hundreds of sharks filmed feeding 30 miles off the coast of Louisiana . The footage was captured by a camera attached to an unmanned underwater vehicle (UUV). Experts say the predators were migrating north and following shoals of fish .