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
AUGUST 21 -
TALKING TANKS
Uncommon Cichlids from Africa
with Michael Liu
Michael Liu, cichlid breeder, visits MASI to talk about breeding cichlids.
Bowl Show
Interesting Algivores
Time to break out your algae eaters and periphyton grazers. Get ready, there WILL be a prize.
Mail to: bowlshow@missouriaquariumsociety.com
Next Special Event
Fall Swap
Saturday, Sep 13, 2025
Local Vendors and Private Sellers Invited.
Over 30 tables of fish, plants, and supplies
Questions?
swap@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!