I dunno where I originally got this from, but I like the amount I can make (12 cups). My local fish store will keep bones for me, for no charge!
Put all ingredients in a large stockpot over medium heat.
Bring to a boil, reduce heat, partially cover, and simmer for 2 hours.
Strain.
Refrigerate or freeze until ready to use.
I like to freeze in ice cube trays, then place in a ziplock freezer bag (doubled, to prevent any possible freezer burn).
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