The Greater Portland Aquarium Society (GPAS) meets the last Sunday of every month at the East Portland Moose Lodge, 16411 NE Halsey Street, Portland, OR 97230. GPAS is a group of Tropical Fish hobbyists from Beginners to Experts. The club brings in speakers knowledgeable in their field throughout the year. The club sponsors many programs for members to help them become more successful fish keepers. .