No. 20-97October Term 2020Decided Mar 22, 2021
Massachusetts Lobstermen's Assn. v. Raimondo
The immediate issue is whether the Supreme Court will step into a major fight over presidential power, ocean conservation, and commercial fishing access.
Case status
- Current stage
- Decided
- Latest event
- Decision released Mar 22, 2021
- What it's about
Commercial fishing groups challenged President Obama’s creation of the 3.2 million-acre Northeast Canyons and Seamounts Marine National Monument in the Atlantic, which restricted lobster and crab fishing in the area. The dispute centers on whether the Antiquities Act lets a President create such an offshore marine monument and whether this monument is larger than the statute allows.
Question presented
1. Whether the Antiquities Act lets a President create such an offshore marine monument? 2. Whether this monument is larger than the statute allows?
- Case path
United States Court of Appeals for the District of Columbia Circuit / Decision released Mar 22, 2021
- Area
Business and Regulation
Briefing
What it's about
Commercial fishing groups are asking the Supreme Court to take a fight over President Obama’s 3.2 million-acre Northeast Canyons and Seamounts Marine National Monument. They say the Antiquities Act may not allow an offshore marine monument of that size, especially one that restricts lobster and crab fishing.
Vote
The case is pending, and oral argument has not been scheduled. The fishing groups argue the Antiquities Act covers only certain federally owned or controlled land and that this 3.2 million-acre monument is larger than the statute allows.
Impact
The case could affect whether fishermen can return to parts of the monument area and how far presidents can go in setting aside ocean areas. That matters for lobster and crab businesses, coastal communities, and future marine conservation orders.
What's next
Watch for the Court to decide whether to hear the case and, if it does, to schedule oral argument. No decision window is available yet.
What is the core dispute in Massachusetts Lobstermen's Assn. v. Raimondo?
The fishing groups challenge the offshore monument under the Antiquities Act. They say the law may not authorize this kind of marine monument or one this large.
Who could feel the real-world effects of this case?
Lobster and crab fishermen could be directly affected because the monument restricts fishing in the area. Coastal businesses tied to that fishing could also feel the impact.
What should readers watch for next in this case?
The next key step is whether the Supreme Court grants certiorari, the Court's decision to hear the case. If it does, the next major milestone would be oral argument scheduling.
Decision
What the Court decided
The immediate issue is whether the Supreme Court will step into a major fight over presidential power, ocean conservation, and commercial fishing access.
Impact
The case could affect whether fishermen can return to parts of the monument area and how far presidents can go in setting aside ocean areas. That matters for lobster and crab businesses, coastal communities, and future marine conservation orders.
Not official Court text.
Opinion documents
Timing
Decided March 22, 2021
The Court released its decision on March 22, 2021 without hearing oral argument.
Documents
Related cases




Grounding
- Grounding
- Primary materials plus reporting.
- Note
- Best-effort analysis: this explainer relies on a mix of primary materials and trusted secondary sources. Official filings and opinions remain authoritative.
- Checked
- Jul 2, 2026
- Method
- Methodology