The dolphins or false killer whales were found on an isolated beach in northwest Tasmania. About 136 are alive, but authorities say it will be a challenge to refloat them.

Marine experts have given up hope of rescuing 157 false killer whales that stranded on a remote Australian beach.

Dozens of false killer whales stranded on a remote beach in the Australian state of Tasmania will be euthanised after bad weather and the isolated location hampered efforts to push them back into the waters,