Marine Life During Cambrian Explosion (image) University of Adelaide Caption This image depicts marine life during the Cambrian explosion (~520 million years ago). A giant Anomalocaris investigates a trilobite, while Opabinia looks on from the right, and the "walking cactus" Diania crawls underneath. All these creatures are related to living arthropods (creatures with exoskeletons and jointed appendages, such as insects, arachnids and crustaceans). Credit Katrina Kenny & Nobumichi Tamura Usage Restrictions None 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.