I think it’s possible to fish in any body of water, I tried making a little fishing hole too after Polys suggestion. The fish seem to be projected from the fishing rod, or it’s pulling them from another iteration. As @sheralmyst ppointed out, there’s someting fishy going on with these fishing rods 
Has anyone tried visiting the portal address given on the first note from the Celeste?
I’m screenshoting everything for the lore thread but I haven’t looked ahead on the milestones (still on phase one, breaking for food and a movie), maybe its part of the expedition. If going to that Portal address isn’t part of the expedition I wonder what it could be? ;0;
Maybe we have to go fishing for ARG clues? Someone dash my expectations quick before they get out of hand!
edit:
I still haven’t fished up a bottle yet. I do have my fishing rig on a turbocharged slot so maybe that increases chance of fish so less chance of infectious lyrics from Sting and The Police?
Will take it off and report back.
Reporting back. I just caught Tangleweed Flotsam three times in a row after taking it off the turbocharged slot so it either has an effect or it was purely coincidental. Also this Flotsam counted for “the one that got away”, it doesn’t need to be a message in a bottle 