Wrecked on the Great Barrier Reef with his family and Australian friend Henk de Jong, Le Serrec and family had bought a motor boat and had decided to spend three months on Hook Island (one of the Whitsunday Islands). They were all crossing Stonehaven Bay on December 12th 1964, when Le Serrec’s wife spotted a strange object on the lagoon floor. It proved to be a gigantic tadpole-like creature, estimated at about 30 ft long. They took several still photos, gradually moving closer. Eventually Le Serrec and de Jong plucked up the courage to approach it underwater in order to film it. It proved larger than first thought, with its estimated length increasing to 75-80 ft. It didn’t move and they suspected it might be dead, but just as Le Serrec began the filming it opened its mouth and made movements toward them. They returned to the boat, and by this time the creature had moved off.