That's commercial fishing only according to NOAA website and it closes today the 20th

Massachusetts Commercial Summer Flounder Fishery Closure

Contact: Sustainable Fisheries Division
(978) 281 –9315

 FOR IMMEDIATE RELEASE:
July 18, 2017
Effective Date: 0001 hours on July 20, 2017
The 2017 commercial summer flounder quota allocated to Massachusetts has been harvested. Effective 0001 hours July 20, 2017, fishing vessels issued a Federal moratorium permit for the summer flounder fishery may no longer land summer flounder in Massachusetts for the remainder of the 2017 calendar year. This closure is concurrent with the Commonwealth of Massachusetts’ closure of its commercial summer flounder fishery to state permitted vessels and dealers, effective 0001 hours on July 19, 2017.
Vessel owners issued Federal permits must continue to complete and submit vessel logbooks for all other species landed. Additionally, dealers issued Federal dealer permits for summer flounder may not purchase summer flounder from federally permitted vessels that land in Massachusetts for the remainder of the calendar year. Federally permitted dealers must also continue to report all fish purchases from any vessel.