Greater Seattle Aquarium Society – Seattle, WA, US

Washington nonprofit founded in 1971 to promote interest in the aquarium hobby and provide a forum for the exchange of information among aquarium hobbyists. Monthly meetings (September through June, normally the second Saturday at 1 PM) feature an hourlong presentation plus a member auction of fish, plants, and dry goods. Holds two large fundraising auctions each year (plant auction in November, general auction in April), runs a monthly newsletter, library, and Breeder's, Horticulture, Conservation, and Monthly Photo award programs.

Source: Official GSAS About page (https://www.gsas.org/tour.html): "GSAS was founded in 1971 and as of this writing (2025), GSAS has over 400 members"

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