Incredible facts about the orcas in our oceans

Orcas are marine mammals who belong to the dolphin family (Delphinidae). They are the largest species of dolphins and are recognisable by their black-and-white coloration and white patches near each of their eyes.  

Why are orcas also called “killer whales?” 

It’s believed that when European fisherman and sailors encountered orcas hundreds of years ago, they witnessed orcas hunting whales. As a result, they named the species “whale killers.” When the name was translated into English, it became “killer whales.” Although known to hunt a variety of species, there have been no documented cases of orcas killing humans in the wild.   

Do orcas live in groups?  

Yes, orcas live in close-knit groups called “pods.” Orcas live in a matriarchal society, where older females pass down knowledge and specific behaviours to the younger members of their family.   

What do orcas eat?  

Orcas are the ocean’s apex predators, which means they have no natural predators. Depending on where they live, orcas can eat fish, stingrays, sharks, whales, seals, penguins, and much more. Orcas have even been know to hunt great white sharks. 

Are orcas endangered? 

According to the IUCN, orcas are currently listed as “Data Deficient,” which means their conservation status is unknown. However, the Southern Resident Orcas (a population of orcas who live off the US Pacific coastline) are considered endangered under the Endangered Species Act. This is largely attributed to the decline of Chinook salmon in their habitat – which makes up 80% of their diet.   

What was Blackfish about?  

Blackfish, the documentary, told the story of Tilikum, a captive orca who killed several of his trainers. The film also explained the controversies behind keeping orcas in captivity. Because of the film, SeaWorld announced it would end its orca-breeding program.  

Where can I see orcas in the wild?  

Orcas are the most widely distributed mammals, living in every ocean around the world. It is rare to see orcas around Australia, they have occasionally been sighted in all state and territory waters. Orcas are commonly spotted off Bremer Bay in Western Australia between January to April each year. Bremer Bay - about five hours south east of Perth - is home to a large and regular gathering of orcas which may represent the largest group in the Southern Hemisphere.

Image: Thomas Lipke by Upsplash

Orcas are one of the most widely distributed mammals, living in every ocean around the world.