pond
yes
The goldfish will eat the mosquito's larvae before they can leave the pond and fly.
no the goldfish would it the tadpole
goldfish
Year round, but especially in Spring for pond goldfish.
not if it is your pet. you have to go to the oet store for certain pet food for goldfish
snails
Yes they can
usually cats
I have never heard of a "Pond Rocket Goldfish" and I can find no listing for such an animal in any fish reference book. That fact suggests to me that someone has made up name for a fish they didn't know how to identify. If the fish is a basic goldfish shape and has a tail that is very long (about half to one body length) it is probably a "Comet"
goldfish, koi