How do these fools think tropical fish always travel? They come in in plastic bags with water and oxygen from all over the worlds by air. After you pay in some cases hundreds of dollars for them, the store puts them back in a baggie for you to take home.
So9
That's why I ask what the real issue is.
If a goldfish in a baggie is the prize for winning a shooting gallery game, they could keep the fish in a tank and then put them in the baggie to give to the kids.