Lost gray whale at Laguna Beach, just feet from swimmers

An amazing video has emerged from California, USA of a lost gray whale at Laguna Beach only a few feet away from a group of swimmers.

The incredible drone footage shows the marine mammal cruising around the shallows of the clear blue water.

The swimmers appear to be oblivious to the huge creature beneath them.

"A gray whale showed up inside Dana Point Harbour today and was lost inside for a couple hours," the filmer wrote online.

"After it exited the harbour, it continued up the coast towards Alaska where the rest of the gray whales are feeding right now.