Sperm Whale Codas (AUDIO) University of Southern Denmark Your browser does not support the audio element. Caption This is a recording of a sperm whale producing a coda -- a message. Credit University of Southern Denmark Usage Restrictions with credit 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.