Answer:
Born in the ocean and white as snow. When I fall back to water I disappear without a trace.
What can one catch that is not thrown?
I have cities without people forests without trees and oceans without water. What am I?
Soft hairy from door to door. I am the pet that always stays on the floor.
What can you catch but never throw?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?