>>928277Most states do stock small fish
We stock fish at almost every size anywhere from 1-2 inches up to 7-10 lb brood stock
But the majority of the fish released are about 10-14 inches
But the second most released size is 3-6 inches
So they very well could be stocked fish
Also qualifications for being native are a bit different from what you're describing
You're discribing a possible wild born fish
Which can be the start to an (eventually) native population (it's all a bunch of technical mumbo jumbo based on the states definitions and heir decisions ) that I really personally don't care about
I would call them wild fish personally to avoid any confusion. But that's just me
>>928300You also may be surprised on how little trout end up spawning ( only talking from my personal experience , mostly from one river where I live ). But I've found that very few trout actually end up spawning and creating wild fish
It's just not terribly common
I've done electroshocking with biologists to try to figure out survival rates and to figure out if fish are reproducing naturally
And while we do come across some "wild " fish the majority of what we pull out of the water is stocked trout and holdovers
Though things could be different where you're from
>>928321Goldfish can ,will, and do pretty well in the wild
I know of a few pounds where people have released goldfish and they do nothing but thrive and they do reproduce
Eventually fucking a pond
Same thing with koi
They can and sometimes do thrive in North America
Never seen cold water bother them