Discovery Loch Ness (1993)
Mystery Casebook In 1993 Discovery Communications began to research the ecology of the loch. The study did not focus entirely on the monster, but on the loch's nematodes (of which a new species was discovered) and fish. Expecting to find a small fish population, the researchers caught twenty fish in one catch, increasing previous estimates of the loch's fish population about ninefold.

Using sonar, the team encountered a rare kind of underwater disturbance due to stored energy (such as from a wind) causing an imbalance between the loch's warmer and colder layers. While reviewing printouts of the event the next day, they found what appeared to be three sonar contacts, each followed by a powerful wake.

These events were later shown on a program called Loch Ness Discovered, in conjunction with analyses and enhancements of the 1960 Dinsdale Film, the Surgeon's Photo, and the Rines Flipper Photo.

Source & References:

http://en.wikipedia.org/wiki/Loch_Ness_Monster

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