The BioLogical Undersea Energy (BLUE) program, funded by DARPA - Biological Technologies Office, is seeking to develop power supplies that capture and convert microscopic forms of marine biomass and other substances into electrical power. These power supplies are intended for onboard use by ocean-deployed sensor systems currently powered by batteries. The goal is to create power supplies that can self-refuel and operate fully submerged, delivering battery-level power without the need for servicing for extended periods of time. The BLUE power supplies will enable high capability and long endurance ocean-deployed sensor systems. For more information and to submit a proposal, please visit the SAM.gov Contract Opportunities website. The deadline for submission is April 30, 2024.