About COSS

The Chicago Ornamental Shrimp Society was created to connect shrimp and invert keepers in the Greater Chicago metropolitan area. This includes all of Chicago and its surrounding suburbs, southern Wisconsin to include Milwaukee and the NW parts of Indiana.

Our primary focus is educating aquarium hobbyists about keeping dwarf shrimp and other inverts.

Member Gallery

Here are a selection of pics from some of our member’s tanks.

Upcoming Events


Due to the current Pandemic, we will be hosting virtual meetings.
Please join our Facebook page for additional information.


Visit C.O.S.S. on Facebook

Past Events

Join Us

Please join our Facebook group for the most up to date information about events and our members.  If you are in Chicago or the surrounding area, come join us.  We currently have no membership dues and anyone can participate in our Facebook group and attend our events.

Visit C.O.S.S. on Facebook

Our Sponsors