EPA is issuing a supplemental proposed rule to reduce the spread of invasive species that occurs with normal operation of large marine vessels. Following public input on EPA's 2020 proposed rule--including meetings with states, Tribes, and other stakeholders--the agency is now issuing a Supplemental Notice to share new data and control options raised by stakeholders. This supplemental proposal will bolster the development of a final rule to stem the spread of invasive species and better protect our nation's aquatic ecosystems.