Photosynthetic Algae (IMAGE) University of Toronto Caption Micrograph of photosynthetic algae (cryptophytes) showing the bright blue coloring of their light-harvesting complexes: special proteins that specialize in capturing energy from sunlight. Credit Greg Scholes Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.