missouri's aquatic hobby and conservation organization
Join us in preserving aquatic ecosystems and enhancing your aquarium hobby experience.
Welcome to
The Missouri Aquarium Society Inc, (MASI) is a nonprofit hobbyist organization focused on aquariums and aquaculture. We welcome anyone with an interest in aquatic life to come to our meetings or events as our guest. We would love to meet you. Our members include beginners and experts, children and adults, casual hobbyists and professional aquascapers, and all are welcome here!
the Missouri Aquarium Society
Membership in MASI helps us bring expert speakers for our speaker series and streamed YouTube programming, funds Darter Magazine, one of the best aquarium magazines in the nation, and supports our efforts in the community and to support aquatic conservation around the world.
Coming up Next from MASI
Next General Meeting
Nov - Breeding blackworms
W/Mandy Goan
Mandy Goan, of the Aquarium Club of Maryland, is coming to MASI as part of her "breeding blackworms" tour in which she demonstrates an easy method for cultivating blackworm populations.
Bowl Show
Temporarily on Hiatus
Send us a video of your coolest tub pond, or regular pond for a chance to win a prize.
Mail to: bowlshow@missouriaquariumsociety.com
Next Special Event
Fall Auction
Our Auctions are Held at Jost Chemical!
Located at 8150 Lackland Rd.
Nov 7, 2026
All MASI Events Hosted @ Jost Chemical Company
Meetings are held on the 3rd Thursday, staring @ 7:30
Entry is Free!
All Ages Welcome!
Open for viewing at 10:00 A.M.
Auctions starts at 11:00 A.M. and go until 2:00
Refreshments will be sold!
Contact Us Today
Reach out to Missouri Aquarium Society for inquiries about aquariums, fish, and our conservation efforts. We look forward to connecting with you!