You have probably heard of CSAs, community supported agriculture, arrangements in which consumers subscribe for food from local farms.
There are also CSFs, community supported fisheries. Same kind of deal: you say what you want and how much, and go pick up your fish.
Sea Forager in San Francisco operates this way; founder Kirk Lombard shares his ideas in a book The Sea Forager's Guide to the Northern California Coast.
The book provides tips on catching and collecting your own fish, clams, and seaweed, all delivered with Lombard's sense of fun and humor.