The incredible birth of a killer whale at SeaWorld in San Diego has been caught on camera.
Footage shows the mother, Kasatka, swimming around her tank early this morning with the tail of her calf poking out of her body as zoologists look on.
It is not long before the calf makes its way free and instinctively rises to the surface to take its first breath.
The calf immediately dips down again to swim alongside its mother.
The baby killer whale, which is yet to be named, weighs about 150kg and is approximately 2m long.
This is Kasatka's fourth calf and the sixth killer whale to be successfully born at the SeaWorld in San Diego.
Zoologist Mike Scarpuzzi said both Kasatka and her calf appeared to be doing well.
"Our initial observations indicate this is a strong healthy calf," Mr Scarpuzzi said.
"As with any newborn, the first few days are critical. We're looking forward to the continued bonding of mom and calf and the baby beginning to nurse."
Killer whales have a gestation period of 18 months.
Source: SeaWorld San Diego
Author: Emily O’Keefe, Approving editor: Mark Worley