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
FEBRUARY 19 -
Christopher Rice - Beaver Dam Analogues
Missouri Department of Conservation ecologist Christopher Rice is coming to MASI to discuss the creation of Beaver Dam Analogues to support river fish, a project that MASI contributed to last year.
Bowl Show
Grumpy Fish
Send us your grumpiest-looking fish picture and win a potential prize. Videos should be 10-20 seconds.
Mail to: bowlshow@missouriaquariumsociety.com
Next Special Event
Winter Swap
Saturday, Mar 7, 2026
Thousands of fish. Plants. Tanks. Miscellaneous Supplies. What could this mean? Time for the MASI Auction. Bring your friends, and your wallet, and get ready to have fun and bid big.
Questions?
auction@missouriaquariumsociety.com
Doors open @ 11
All Events Hosted at Jost Chemical Company
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!