It transpired that the August 1936 sea serpent sightings in the Humber around Grimsby were none other than a young whale. The creature was spotted by a group of campers, and later it was seen floating upside down 50 yards below the high water mark. They approached and noticed that it was still breathing, but evidently in trouble. It was 10 feet in length and 20 inches across at its greatest diameter.

It was claimed that its mottled black and grey skin could account for the many sightings in the Humber recently, but not everyone was convinced and stories continued to flood in regarding the Humber Sea Serpent.