Welcome to CMAS

The Chicago Marine Aquarium Society (CMAS) is dedicated to providing the reefkeeping hobbyists with the richest community from which to share ideas and learnings and monthly meetings and twice yearly frag swaps to get you the goods.

CMAS Frag Swap - June 7th
Come to our frag swap for frags, vendor & member booths, coral cutting class and our guest speaker Mr Saltwater Tank.  June 7th at 10am at DuPage Expo Center in St Charles
Click here for more details

New! CMAS Members Forums
Join the discussion at our new CMAS Members Forums.
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CMAS is proud to be a member of the Marine Aquarium Society of North America.