Harvey Robertson, aged 52, was looking at the beauty of the water while on a boat cruise with his family on the isle of Corfu, Greece. He took some snapshots of the water while in a cave, only to be surprised when he lifted his camera and took a closer look at the photo. What he saw was a mysterious creature in one of the frames.

The Scottish tourist was surprised, having photographed the creature by accident. “I was trying to capture the water color and was not looking at the water, the flash went off. I only saw the creature when looking back through my pics,” he says.

Nobody has been able to identify the creature!