If anyone catches a Stringish and is going to sell it, PLEASE wait until the end of March. If I don’t catch one, I’d have to wait until December. I’ll give you way more bells than Nook will.
Yeah. You can swap them between files on the same island, but you can't give them to other players. (and swapping between files doesn't actually add them to the critterpedia.)You can't trade fish
I caught a stringfish pretty fast the other night by throwing bait into the river on the cliffs. Farm manila clams, make lots of bait, go fishing for a while. That's how I got most of my rare fish.