A total of 10 pilot whales have died and another 41 remain stranded in a remote area of Everglades National Park on Wednesday, officials said Wednesday afternoon.
A team that arrived on the scene Wednesday morning found six whales dead, and they were forced to euthanize four through sedation as a humane option, NOAA Fisheries Southeast marine mammal stranding coordinator Blair Mase said.
The swimming whales do not show any signs of injury or trauma, but there is not a lot of time to save them, Mase said.
And because the members of the deep water species are out of their normal home range, they may be dehyrdrated or malnourished, Mase said.
They are in Monroe County near Highland Beach, which is the western boundary of Everglades National Park. The closest deep water is about 20 miles west. In between are sandbars and channels that would be very difficult for the whales to navigate on their own.
But efforts to herd the close-knit animals out of the area – which is about 90-120 minutes from the nearest boat ramp – have not been successful so far.
Mase said there would be a multi-day effort to rescue the animals that would last at least through Thursday and possibly Friday. She strove to set expectations low, saying that the goal is to save the whales, but most mass strandings do not have a successful outcome.
The goal is to keep the whales alive during low tide, and then when high tide comes in, crews will try to get them back into the sea, Everglades National Park spokeswoman Linda Friar said.
The whales are slightly larger than dolphins, Friar said.
Mase said Wednesday afternoon that necropsies were being conducted on the beached whales to try to determine their cause of death and find clues on why they ended up beached in the area.
When the team returns from the remote location, its members will brief NOAA officials on how to move forward Thursday.
“So we are going to explore options for these animals. We are going to work hard to try to find out if we can save any, but we want to set the expectations low because the challenges are very, very difficult – the environmental challenges, the resource challenges, the location of the whales,” Mase said.
Officials are also talking with experts from different countries that have experience with herding, she said.
“The outlook does not ultimately look good for the remaining live whales,” Mase said.
The whales, who scientists say appeared confused, were originally spotted around 2:30 p.m. Tuesday near Highland Beach, according to Friar.
Friar said rangers and workers from the National Oceanic and Atmospheric Administration responded and found 10 beached whales and the others in shallow waters nearby.
Four of the whales died but the workers were able to get six back into the water, Friar said. Workers left for the night but returned Wednesday to try to assist the remaining whales.
The shallow water was making it difficult to get the whales back out to sea, she said.
"It's so shallow at low tide for such a long distance it makes it more difficult to get the whales to an area where they can swim away," Friar said.
It's not unusual for the whales to end up in the shallow waters, which stretch for hundreds of yards, Friar said.
"The thing about these whales, as the day heats up they'll have to keep them wet," she said.
The Florida Fish and Wildlife Conservation Commission, Marine Mammal Conservancy and Marine Animal Rescue Society are assisting the rangers and NOAA Fisheries in the rescue effort.
"The agencies are coming together to do what they can," Friar said.
Mase said people need to be "realistic about the options for these animals.
"Euthanasia might be the most humane option. The animals could be compromised," Mase said.
The Gulf of Mexico has a very strong pilot whale population and this pod is very far from where they normally would be. They are very far from their deep water habitat and this makes it difficult for rescuers to "push" them back out to sea, Mase said.
"If we did push the healthy ones out, if they see one dead one they will come back again," Mase said.
She said a mass stranding occurred in Fort Pierece in 2012.
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