Dozens of dolphins have died after a pod of more than 150 stranded on a remote beach in Australia’s southern island of Tasmania, environment officials said Wednesday. A pod of 157 dolphins from a poorly understood deep-sea species was believed to have stranded in the past 48 hours — with “approximately 90” still alive as of Wednesday morning.

More than 150 false killer whales have been stranded on an isolated beach in the Australian state of Tasmania, with rescue crews trying to save the majority of the large dolphins that survived the ordeal,