Ich kann dir nicht mit Sicherheit sagen was es ist, aber das ist kein Grund von der Existenz kryptischer Eiswürmer auszugehen bzw. ihre Existenz sogar als erwiesen anzusehen.
But the BLM concluded that experts at another federal agency — the Alaska Department of Fish and Game — have "the most compelling explanation."http://www.npr.org/sections/thetwo-way/2016/11/01/500223529/alaskan-ice-monster-sparks-imaginations-online
Which is ... a rope.
An ice-covered rope caught on a pier.
If you'd like to know more about this Alaska-sized letdown, the Alaska Dispatch News has the definitive coverage of the situation.
One expert summed it up in a few blunt words, telling the newspaper that the video might look cool, but the truth is just "not that exciting."
For all those speculating over what the object might be, Alaska Department of Fish and Game Tanana River Management Biologist Klaus Wuttig has an answer.https://www.adn.com/alaska-life/2016/10/26/string-sturgeon-or-sea-monster-chena-river-creature-baffles-internet-observer...
He thinks it's probably just rope stuck to a bridge pier. He said cold temperatures at night allowed frazil ice — a kind of loose, slushy ice that forms on water — to stick to the rope, which caused it to float to the surface.
He admitted that the video looks "really cool" but the reality is "not that exciting."
Halte ich für eine sehr plausible Erklärung