I usually put fish in a freezer bag, cover the fish with water, try to get most of the air out and then put it in the freezer. Works OK but definitely changes the fish after it is thawed.

I have heard some people talking about vacuum packing before freezing. They say that when you thaw and eat that you can't tell it's been frozen.

Anybody have any experience with this?
If so can yo recommend a vacuum sealer?

Thanks