Watch: Mass Farewell spit whale stranding
Volunteers sing to stranded whales as attempts are made to push them back out to sea.
Hundreds of pilot whales are dead after a mass stranding at Farewell Spit in Golden Bay.
The stranding is thought to be the third biggest in New Zealand's history.
Rescuers were successful in refloating all of the remaining live whales, but there was a risk the whales would strand again.
MARTIN De RUYTER/Stuff.co.nz
Aerial footage shows the scale of the whale stranding at Farewell Spit
"What they're doing is milling around so we won't know until mid-afternoon whether we're going to have a restranding or not," DOC Golden Bay operations manager Andrew Lamason said.
* Live: Hundreds of whales dead
* Photos: Whales as far as the eye can see
There's no one reason why whales become beached.
Hundreds of pilot whales have died after a mass stranding on Farewell Spit.
Project Jonah general manager Darren Grover says they will be focusing their efforts on today's mid morning high tide when they will try and get the healthy whales back out.
More than 400 pilot whales have become stranded at Farewell Spit in Golden Bay.
The stranding is thought to be the third largest in New Zealand's history.