- Aquarium Reef Keepers of Southwest Connecticut
- Boston Reefers Society
- Brooklyn Aquarium Society
- Capital District Marine Aquarist Society
- Capital Reef Aquarists Club
- Chesapeake Marine Aquaria Society
- Greater Connecticut Area Regional Forum
- Delaware Reef Club (DRC)
- Delaware Valley Reef Club (DVRC)
- East Coast Reef Club
- Long Island Reef Association (LIRA)
- Lycoming County Reef Club
- Maine - Salt Water Addicts of Maine (SWAM)
- Mason Dixon Reef Club
- New Hampshire Reef Club (NHRC)
- New Jersey Reefer's Club
- North Central Pennsylvania Aquarium Reef Society (NCPARS)
- Northern New York Reef Society (NNYRS)
- NY Reef Club
- 3 Rivers Marine Aquarium Society
- Reef Aquarium Society of Charlotte (RASOC)
- Reef Ecosystems Education For North Eastern Schools Trainees (REEFNEST)
- Southern Tier Reef Society
- Susquehanna Reef Club
- Upstate Reef Society