Mantis Shrimp Claws (IMAGE) Duke University Caption Mantis shrimp claws come in a dizzying array of shapes -- from spiny and barbed spears to hatchets and hammers. Rather than evolving in a coordinated way, a new study finds that each part of the mantis shrimp's complex claws followed its own evolutionary path. Credit Photo by Thomas Claverie, Universite de Montpellier. 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.