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 - April 30th 2016 - Featuring Matt Peterson!
Come to our frag swap for frags, vendor & member booths April 30th at 10am at the Odeum Expo Center in Villa Park.  Well known reefing expert & marine fish breeder Matt Peterson will be presenting
Click here for more details

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CMAS is proud to be a member of the Marine Aquarium Society of North America.