I guess I should ask what you mean by cold. How cold is cold?
Texas can get pretty darn cold and plecos seem to do pretty well as an invasive.
I'll also agree that cold may not be best for the fish but I've kept them in tanks without heaters and my buddy keeps all of his tropical tanks without heat. He's spawned more fish than I ever did with heaters.
And now I come back to the original question...how cold is cold?
forgot to mentino he is still alive in about 66degrees and doing great.. the person that had it before me had there power go out for a week and lost all tehre fish but that one