25 whales have been helped back into deeper water on Tasmania's West Coast as rescuers brace for an operation that will stretch out for days.
A third of the 270 stranded pilot whales have died, but the weather and tidal movements are becoming more favourable for the rescue team in Macquarie Harbour near Strahan.
Marine Conservation Program wildlife biologist Dr Kris Carlyon has provided an update.
"We know this was a natural event, we can accept we are going to lose some animals, this is such a tricky and complex event, that any whale we save we consider a real win."
He admits it can be a bit overwhelming at times.
"It is fatiguing, physically fatiguing, but also mentally fatiguing, so we are dealing with large stressed animals for several days, it does take an emotional toll sometimes."