A dramatic encounter recently unfolded off the coast of California that left even seasoned naturalists in awe. The showdown? Between a shark and an orca. But before you think this is the retelling of another great white versus killer whale battle off South Africa, hold up!
The shark involved in this fight was a blue shark. And this happened far from the African continent.
Blue sharks (Prionace glauca) are one of the most widely distributed shark species, found in temperate and tropical waters across the globe. Named for their distinct blue coloration on their upper body and bright white underside, these sleek predators are characterized by their slender bodies and long, pointed snouts. Growing up to around 13 feet in length, blue sharks are formidable hunters, preying primarily on small fish and squid. Despite a fearsome appearance, they pose little threat to humans and are often sought after by ecotourists to swim with. However, they face threats from overfishing and bycatch in commercial fisheries, making conservation efforts crucial for ensuring the continued survival of this iconic oceanic species.
Orcas, or killer whales (Orcinus orca), are apex predators found in oceans worldwide, from the Arctic to the Antarctic. Known for their distinctive black and white coloration and highly social nature, orcas are the largest members of the dolphin family. These intelligent creatures live in matrilineal pods led by older females, exhibiting complex social structures and communication patterns. Their diet is diverse and varies depending on their location, including fish, seals, sea lions, and even other whale species. Remarkably, orcas have been observed hunting and consuming prey in coordinated strategies, showcasing their advanced hunting abilities. This includes tag-teaming to hunt down great white sharks. A behavior observed primarily off the coast of South Africa, this type of hunting has been made famous by a pair of orcas nicknamed Port and Starboard who have developed a notable preference for hunting great whites.
Port and Starboard aren’t off California. So, why are orcas hunting sharks here?
The remarkable footage shows a blue shark cruising through the Monterey waters, blissfully unaware that five killer whales had set their sights on the unsuspecting predator. Possibly on the surface to feed, Evan Brodsky of Monterey Bay Whale Watch recorded as the blue shark seemed to react in surprise and swim hastily away, evading the curious gaze (and appetites) of the mighty orcas.
Dubbed “Louise’s family” by researchers after their matriarch, this pod of orcas are regular visitors to the Monterey area, being spotted many times throughout the year. Referred to scientifically as CA140B, these transient killer whales (also known as Bigg’s killer whales) constitute a genetically and culturally unique group or ecotype of orcas inhabiting the Pacific Northwest. Unlike other orca populations, they specialize in hunting marine mammals as their exclusive prey. “They got super-curious about [the shark], but they didn’t touch or harass it,” marine biologist Colleen Talty told McClatchy News. “What a rare and lucky encounter today between two unique species!” Monterey Bay Whale Watch reported on Facebook.
But although rarely seen, this isn’t the first time footage like this has been recorded. Orcas were seen feasting on sharks off the Southern California coast earlier in the year. “We were extremely lucky to find a pod of these shark eating orcas last Friday at San Miguel Island. They chased after a large mako shark and eventually grabbed this blue shark, parading it around in their massive jaws,” reads the caption by Instagram accounts @pacificoffshore and @whatcameradoyouhave. “Offshore Killer Whales have a remarkable range. The same pods are seen from the Aleutian Islands, Alaska, all the way to Southern California.”
These encounters are just one piece of a larger puzzle that has left scientists scratching their heads. In the past few years, reports of killer whales exhibiting increasingly “assertive” behavior have surged, sparking both fascination and concern among marine enthusiasts. Stories of boats being targeted and even sunk by these marine giants have sent ripples of concern throughout coastal communities. And the recent unprecedented event off the coast of South Africa, where a lone Starboard made history by becoming the first of his kind to single-handedly hunt and consume a great white shark, not only underscores the awe-inspiring capabilities of these marine giants but also raise questions about their evolving dietary preferences and ecological impact.
One thing remains certain: the encounters between killer whales and their fellow inhabitants of the sea are as captivating as they are complex. For now, scientists are trying to delve into the depths of orca psychology to unravel their behaviors.
