The sun shines through the water in the ocean

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!

Join or Renew

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

JUNE 19 -

Talking Tanks

Fish Nutrition w/Charles Bradfield

Charles Bradford, of the popular aquarium podcast "Watercolors," is visiting MASI to discuss fish nutrition, fish food, and other things. Don't miss this talk, as it is likely going to be fascinating.

Bowl Show

a couple of yellow shrimp are in the water

Investigating Invertebrates

Send in your videos for the best invertebrates. Snails, shrimp, freshwater mussels, aquatic insects? Please limit video length to 10s. Winner will receive a prize.

Mail to: bowlshow@missouriaquariumsociety.com