The pilot whale was found stranded on an exposed beach along the Tasmanian coast on Wednesday.
Rescue operations are underway to save the remaining whales.
“We are primarily focused on getting involved and getting through this rescue operation this morning. [the whales] released,” Brendan Clarke of the Tasmanian Parks and Wildlife Service told the Australia Broadcasting Corporation on Thursday.
“We are aware that some of them may end up on the beach themselves and so we will monitor that.”
Rescue workers had previously estimated that about half of the whales were still alive.
More than a dozen sperm whales, mostly young males, were found dead on another beach in what is believed to be the second mass stranding of whales in Tasmania this week.
The phenomenon of whale traps has puzzled marine scientists for decades.
Tasmania’s largest stranding was in 2020 when more than 450 pilot whales were found.