Submerged Origin & Mystery Local lore and diving clubs confirm the life-sized shark was constructed as a realistic prop for a 2002 amateur short film titled Choc au Lac by local youth association Fréquence Jura. Rather than destroying the prop, it was quietly moored to a lakebed boulder at approximately 7 to 9 meters depth as an underwater landmark.

Freshwater Limnology & Murk Unlike clear tropical oceans, Lake Neuchâtel features glacial run-off, particulate sedimentation, and seasonal algae blooms. Visibility fluctuates between 1.5 and 6 meters, meaning divers descending into the green gloom do not see the gaping jaws until they are just meters away.

Diver Pilgrimage Site Over two decades underwater have coated the fiberglass skin with fine silt and freshwater algae patina. Swiss diving clubs regularly inspect the anchor lines and use the shark as a compass calibration checkpoint alongside a sunken rowboat and dragon nearby.