The Farallon Islands are an important seasonal feeding area for white sharks. Each fall, adult and subadult sharks return to the waters surrounding the islands as a part of their seasonal migration, drawn by the abundance of northern elephant seals, harbor seals, and sea lions that provide a reliable food source.
According to NOAA’s Greater Farallones National Marine Sanctuary, the region’s nutrient-rich waters support an exceptionally productive marine ecosystem, with white sharks playing an important role in maintaining this ecosystem as apex predators.
While white sharks are a familiar part of the fall wildlife season, recent Oceanic Society whale watching trips have offered unusually consistent opportunities to observe these impressive predators. What might typically amount to a handful of sightings over the course of a season has become a more regular occurrence in recent weeks.
“We’re in shark season, yes, but the sightings have been exceptional. In years past, we might have a handful of sightings, but this year has been very consistent. Those we’ve seen have all been big sharks, 11 to 17 feet long depending on the individual, with females being on the larger end of that range. It may have something to do with the warmer water, but hard to say without additional data,” explains Oceanic Society naturalist, Michael Pierson.
On one recent trip, we even witnessed a predation event unfold, with a white shark moving rapidly through the water, seabirds gathering overhead, and signs of the encounter visible at the surface.
A white shark goes after its prey near the Farallon Islands, sending water flying as seabirds circle overhead and blood colors the surface. Photo by Michael Pierson.
Scientists continue to study the environmental conditions that influence when sharks arrive at the Farallones, how long they remain, and how they use these coastal habitats.
White sharks can be surprisingly difficult to spot, even during peak shark season. As Oceanic Society naturalist Pete Winch explains in an interview with the Greater Farallones Association, these predators typically hunt from below the surface, using the element of surprise to approach their prey. The familiar image of a white shark’s dorsal fin cutting through the surface, popularized by Jaws, doesn’t reflect how these animals typically move. Their dorsal fins help stabilize them as they swim, and raising the fin above the water actually compromises that stability.
This view offers a sense of just how massive a white shark is, showing its thick, powerful body and broad tail as it moves through the waters around the Farallon Islands. Photo by Michael Pierson.
Winch also discusses the fascinating seasonal migrations of white sharks between the California coast and an offshore region of the Pacific known as the White Shark Café, located between Baja California and Hawaii. Researchers have documented gatherings in this relatively remote area, but the reasoning remains unclear. One possibility is that it serves as a mating area, although this has not been confirmed.
White sharks aren’t the only highlight of recent whale watching trips. The waters around the Farallones have also offered wonderful opportunities to observe humpback whales lunging through schools of baitfish, common dolphins swimming beneath the surface, and blue whales surfacing in the open ocean.
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- © Michael Pierson
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- © Michael Pierson
Together, these encounters offer a glimpse into the extraordinary diversity of marine life supported by this productive stretch of the California coast. Each trip brings something different, and this season’s exceptional shark sightings are a reminder of just how much there is to discover offshore.
