What stood out for me in this article: https://www.sciencealert.com/there-s-a-bunch-of-eel-dna-in-loch-ness-raising-questions-about-nessie-s-identity is the fact that soooo much DNA was found that belonged to land mammals. Needless to say, no Nessie:
"There was - and this may or may not be a surprise, depending on your feelings about the Loch Ness Monster - absolutely no evidence of any Jurassic-era animal DNA, including plesiosaurs, in any of the samples tested.......We find a large amount of eel DNA. Eels are very plentiful in Loch Ness, with eel DNA found at pretty much every location sampled - there are a lot of them," the researchers wrote on the project's website.
"Researchers had earlier suggested that a giant eel might explain some sightings. That idea then lost popularity as theories about extinct reptiles became more common. But there have been ongoing reports of very large eels by a number of witnesses."
Specifically, the DNA is from European eels (Anguilla anguilla), which does present another problem. As far as biologists know, these fish don't grow any larger than about 1.5 metres (4 feet, 11 inches). To be consistent with Nessie reports, an eel would have to be quite a bit bigger.
The data doesn't reveal the size of the eels shedding their DNA into the loch, but the whole idea is not without precedent. Another strange beast sighted in a highland loch could have been an eel.
In 1865, a huge "sea serpent" was reported in a loch in Leurbost, eel-like in appearance - leading to the conclusion that it was, probably, an eel.
More research will need to be undertaken to understand how an eel fits in with Monster sightings, if it does at all, but the team's findings revealed more about the loch than just ruling out Nessie candidates."
What this really means for us Sasquatch researchers is that soil samples needn't be the ONLY place to search for Sasquatch DNA:
"One of the more intriguing findings was the large amount of DNA from land-based species in the Loch system," the researchers wrote.
"These included high levels of DNA from humans and a variety of species associated with us, such as dogs, sheep and cattle. We also detected wild species local to the area e.g. deer, badgers, foxes, rabbits, voles and multiple bird species. These findings show eDNA surveys of major waterways may be useful for rapidly surveying the biological diversity at a regional level."
There has been a lot of water sampling done everywhere at minimum in the last five years. I think some deeper research needs to be done by folks here into just what F&W and academia is finding for land mammal DNA in their local ponds and lakes. It's something we never really hear about. Just stick with the science and all will be well. https://labs.wsu.edu/edna/documents/2015/05/field-protocol.pdf/