PORTLAND, Maine — A federal judge tossed a lawsuit Friday from a group of fishing associations that challenged the creation of an underwater monument in the Atlantic Ocean.

The fishing groups sued in federal court in Washington against creation of Northeast Canyons and Seamounts Marine National Monument by former President Barack Obama in 2016.

US District Judge James Boasberg granted the Trump administration’s motion Friday to dismiss the suit. His ruling said the groups failed to adequately explain why the monument is too large.

Boasberg wrote that the lawsuit hinged on whether Obama had the authority to use the Antiquities Act to create the monument.


He ruled that ‘‘just as President Roosevelt had the authority to establish the Grand Canyon National Monument in 1908 . . . so President Obama could establish the Canyons and Seamounts Monument in 2016.’’

Environmental groups cheered the decision.

Associated Press