Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
162843
| ME | Cumberland | Atlantic Ocean at Orrs Island | 2004 |
01060001
| Presumpscot | established |
242252
| ME | Cumberland | Atlantic Ocean between Portland and Mackworth Island | 2006 |
01060001
| Presumpscot | established |
242255
| ME | Cumberland | Atlantic Ocean between Portland and Mackworth Island | 2007 |
01060001
| Presumpscot | established |
154287
| ME | Cumberland | Atlantic Ocean off Portland | 2001 |
01060001
| Presumpscot | established |
154288
| ME | Cumberland | Atlantic Ocean off Scarborough | 2001 |
01060001
| Presumpscot | established |
263829
| ME | Cumberland | Atlantic Ocean, Casco Bay off Portland at Peaks Island under the ferry bridge on Welch St. | 2009 |
01060001
| Presumpscot | established |
155679
| ME | Knox | Atlantic Ocean at Crescent Beach in Owl's Head | 2002 |
01050002
| Maine Coastal | established |
1695325
| ME | Knox | Muscongus Bay | 2021 |
01050002
| Maine Coastal | unknown |
154289
| ME | Lincoln | Atlantic Ocean in Muscongus Bay | 2001 |
01050003
| St. George-Sheepscot | established |
615068
| ME | Washington | Atlantic Ocean, Western Bay, west side of Great Wass Island in the town of Beals | 2013 |
01050002
| Maine Coastal | established |
1658658
| ME | Washington | Gleason Point town park, Perry ME | 2020 |
01050004
| Passamaquoddy Bay-Bay of Fundy | unknown |
862465
| ME | Washington | rocky intertidal shoreward of Chair Pond on Petit Manan NWR | 2015 |
01050002
| Maine Coastal | established |
242263
| ME | York | Atlantic Ocean at York Harbor | 2005 |
01060003
| Piscataqua-Salmon Falls | established |
242266
| ME | York | Atlantic Ocean at York Harbor | 2007 |
01060003
| Piscataqua-Salmon Falls | established |
1725310
| ME | York | Intertidal zone, Biddeford Pool, Maine, USA | 2022 |
01060003
| Piscataqua-Salmon Falls | |