Put all of the poaching liquid ingredients into an enameled pan. Simmer for about 1 hour. Strain out the vegetables and discard. Cool the liquids.
Wrap the fish in cheesecloth. Put it into a fish poacher, or long pan, and add the cooled liquids. Bring to a boil and then simmer about 25 minutes. Allow 10 minutes for every inch the fish is thick. If you guess i