It took several attempts for local people to guide the animal safely into the depths, and away to freedom.
Recently, there have been rare sightings of orcas off Cape Cod, at the same time as great white sharks-which they feast upon.
How the giant mammal—which is slowly recovering and still being monitored—managed to survive has puzzled scientists in the area.
The pod was spotted by a whale-watching company that operates in Bremer Bay, which hosts one of the largest orca gatherings in the Southern Hemisphere.
The attack took place during a show at the aquarium, with families watching on as the trainer struggled in the water.
It is the first calf to be born into the endangered family for two years, according to the Center for Whale Research.
In the footage, the killer whale leaps out of the water as the tourists yell in delight at the close encounter.
The People for the Ethical Treatment of Animals claimed that the orca was "deathly ill" with pneumonia however this hasn't been confirmed by the aquarium.
The study shows how quickly killer whales can learn new behaviors and spread it throughout their population.
A pair of orca known as Port and Starboard hunt sharks and remove their livers with what has been described as "surgical" precision.
The killer whales, known as 'Port' and 'Starboard,' have been spotted in South Africa's False Bay, where great whites have vanished from in recent years.
Whale experts said it was first known event where orca have seemingly helped another species in Australian waters
The NOAA's 5-Year Status Review into Southern Resident killer whales shows no recovery of the species, with experts saying a catastrophic event could devastate the entire population.
Laura Millen, who was on the whale-watching expedition, told Newsweek she was left "speechless" by the encounter.
This is the latest in the series of encounters between orca and vessels off the coasts of Spain and Portugal.
The population of Southern Resident killer whales who live off the waters of the northeastern portion of North America stands at 74 whales after the disappearance and presumed death of a male in the summer.
The orca, named T146D, was reported to be 20 foot long and let out five calls when rescuers sprayed it with seawater.
Taking shifts, teams of local volunteers have been braving frigid weather to care for the stranded calf 24 hours a day.
A group of orcas have been spotted chasing and lunging after an otter in the North Sea.
"We see orca quite a bit but they don't tend to accidentally end up getting caught out," British Divers Marine Life Rescue Area Coordinator Emma Neave-Webb told Newsweek.
Erik Martinez and Tyler Jackson got more than they bargained for when they went rock fishing over Thanksgiving weekend.
Three young orcas have been targeting yachts along the coasts of Spain and Portugal since the summer.
The baby is thought to have been playing with a buoy and craypot line when it got tangled.
The attack took place off the coast of Portugal and is the latest in a string of similar incidents.
Researchers say three whales were responsible for more than 60 percent of recent attacks.
After reviewing footage of the attacks, researchers found two of the orcas involved were seriously injured.
Marine biologist describes injuries sustained by the sharks in South Africa after being hunted by orca.
Orcas are known to kill great whites and eat their livers.
Natalie Kepa panicked when she saw "this big black fin" veering near her daughter while they were on holiday in New Zealand's Marlborough region.
Orcas were dubbed killer whales after ancient sightings of them ganging up against other (frequently larger) whale species. More recently, they have also been known to attack and kill great white sharks.