Asian carp, an invasive species, introduced into the United States down south to clean catfish ponds and for weed control, threaten the ecosystem of the Great Lakes. With the Supreme Court denying Michigan’s motion to reopen and for a supplemental decree or, alternatively, for leave to file a bill of complaint (which the state of Minnesota had joined, along with other lake-bordering states and the Canadian province of Ontario), activists consider alternative strategies (for example a legislative solution or perhaps some kind of action in federal court (under the Endangered Species Act?) (See article, here.)