Clash of the titans: white sharks vs. orcas

When orcas and white sharks cross paths, only one can prevail as the true apex predator. New research from the Monterey Bay Aquarium published in Nature Scientific Reports details these rare, sometimes brutal encounters — and their ecological implications.

A new study illustrates what happens when orcas and white sharks encounter each other in the wild. Photo © Jim Capwell/www.divecentral.com

It’s a study decades in the making because observations of the two creatures interacting is a rarity.

Scot Anderson, a white shark expert and seasonal researcher for the Aquarium, still remembers one such run-in more than 20 years ago near the Farallon Islands, a short boat ride west of downtown San Francisco.

“The first time it happened was kind of shocking to everybody,” Scot says. “Before we had seen anything like that, people would ask, who’s the baddest predator?”

White sharks are seasonal visitors to the Farallon Islands, where they prey on elephant seals and other pinnipeds. Photo courtesy NOAA

The first scorecard came on October 4, 1997, when orcas killed and partially ate a white shark within view of a whale-watching boat. Scot was heading out from nearby Bolinas when he heard what was happening over the radio.

“We just went straight there,” he says. “We got there right as it was finishing. I saw the two orcas sticking their heads out of the water and squealing like they do when they have a kill. And the shark just sank away.” Continue reading Clash of the titans: white sharks vs. orcas

Think your parents are tough? Try being a sea turtle

People have some pretty diverse perspectives on raising kids—from the hands-on “helicopter” approach to the hands-off “free-range” style.

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A pod of orcas in Monterey Bay show “helicopter parenting” in action. ©Jim Capwell/www.divecentral.com

In the ocean, the parenting spectrum is even more extreme. Evolution has formed wildly different strategies for plants and animals to create future generations.

The ocean’s helicopter parents are marine mammals, such as orcas and whales. They give birth to one or two calves a year and invest heavily in each one’s survival. Mother orcas give their babies milk and teach them to hunt; the pod provides social connections and protects against predators.

Other animals, such as sea turtles, are hard-core free-range parents—leaving their offspring to fend for themselves from the start.

Continue reading Think your parents are tough? Try being a sea turtle