There are plenty of areas in the U.S. that have tropical climates yr round. Education would be the best means not restricting something to "order only'
I cant recall seeing them available in an lfs. Infact i wanted an arapaima i would just click click click.
Earlier i read somewhere that 1.5 million neon or cardinal tetras were either sold or imported every month (cant remember). Most likely million of them die each yr. Probably similar to the deaths arapaima experience. But on a much larger scale
I guess its the thought of someone could actually care for them if they wanted to that gives that warm fuzzy feeling.
Kind of like bettas. Pimas can't even begin to touch the scale of suffering of bettas. Stuck in a clear pot with a plant above you