Benchley himself can be seen in a cameo in the film as the news reporter who addresses the camera on the beach ... for scenes that required the mechanical shark rig to be rested on the shallow seabed.

Twenty-seven years ago, a day at the seaside took a horrifying turn. It's referred to as 'The Day the Sea Turned Red in Devon'. And it's no overstatement. It began as an absolute mystery. One moment, ...