With 5 kids who never tire of catching or eating Salmon, halibut, lings, rockfish, crab, clams, oysters, etc. we never waste a thing. Probably only give away 10 %. My girlfriend got tired of sockeye last summer but the kids and I didn't so we just kept on grilling it night after night.
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. . . and God said unto them, Be fruitful, and multiply, and have dominion over the fish of the sea . . .