It was a "fish" sort of. As a vertebrate, it might be somewhere in our family tree. Those eyes could have come in handy at poker.
Actually, it looks like a Trump supporter.
It got really, really big and moved into Loch Ness.
I’m thinking with that long snout it was a bottom feeder, digging under the lakebeds and riverbeds for burrowing creatures. That could explain the eyestalks, which would allow it to keep its eyes above the muck watching for predators while it foraged.
Or it could have been an ambush hunter, burying itself on the bottom like an octopus, with just the eyestalks exposed to watch for prey, and using the snout to reach up and snatch anything that swam close enough.
I want a couple for my pool!