Australian Box Jelly (IMAGE) University of Hawaii at Manoa Caption This is a freshly caught, Australian box jelly, Chironex fleckeri, the most notorious killer of the marine world, with a body about the size of a melon and up to sixty 10-foot long tentacles. A sting by this animal can lead to death in as little as 5 minutes. Credit Angel Yanagihara Usage Restrictions Image may only be used with appropriate caption and 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.