I came across this oldie the other day:
THATCHER: DOLPHINS COULD HUNT LOCH
By Mark Smith 16/01/2006 Hi-tech search plan uncovered
A NESSIE hunt using a team of dolphins was planned by the Tory government, according to declassified secret documents. Within days of the 1979 election, officials in Margaret Thatcher's regime proposed importing the mammals from
See original story here:
It sounds bizarre but then could have been feasible who knows? The loch may have been too cold for the dolphins and then again they have sonar to help them see in the peaty black waters. There are always bizarre stories about Loch Ness and they all make interesting reading !