A Mussel's byssal threads (IMAGE) University of California - Berkeley Caption A mussel lays down byssal threads to anchor itself to rocks in pounding surf. UC Berkeley's Philip Messersmith synthesized the bivalve's tough glue in hopes of using it to close surgical incisions during fetal surgery. Credit Philip Messersmith, UC Berkeley 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.