Quick Take
- A great white shark tracked a moving shadow the same way a housecat chases a laser dot, and what that actually reveals about shark cognition is stranger than it looks. Watch the footage →
- The filmmaker deliberately moved the drone's shadow toward multiple sharks, and their consistent reaction raised a question science still can't fully answer. See Gauna's experiment →
- Great white sharks are highly visual hunters, but their eyesight works nothing like you'd expect from an apex predator. Explore shark hunting behavior →
- Whether the shark saw the shadow as prey, a curiosity, or something else entirely changes everything about what this footage actually proves. Explore the shark's reaction →
Anyone who has watched a housecat chase a laser pointer knows how irresistible a moving dot can be. But what happens when a great white shark encounters something similar in the ocean? Wildlife filmmaker Carlos Gauna captured a remarkable reaction when he moved his drone’s shadow across the water near a great white shark. Instead of ignoring it, the massive predator changed direction and began following the shadow. Even more surprisingly, other sharks responded in much the same way. The footage raises an intriguing question: Was the shark playing, investigating something unfamiliar, or responding to an instinct that makes it one of the ocean’s most successful hunters?
Watch This Great White Shark Chase a Moving Shadow
What Happened When the Shark Spotted the Drone’s Shadow?
The footage comes from Carlos Gauna, the wildlife cinematographer behind The Malibu Artist. Gauna has spent years using drones to document sharks and other marine animals along the coast of California, capturing behaviors that would be difficult to observe from a boat or the beach.
While filming great white sharks off Southern California, Gauna began wondering whether the animals could detect his drone flying overhead. Rather than simply assuming they were unaware of it, he decided to investigate how they responded when its shadow moved across the surface.
As the footage shows, the reaction was surprisingly clear. When the drone’s shadow passed near a shark, the animal changed course and began following it through the water. Gauna repeated the demonstration with several sharks and observed similar responses.
In an account reported by PetaPixel, Gauna explained that the sharks responded to the shadow even when it appeared beside or behind them. At times, he could seemingly influence their swimming direction simply by moving the shadow.
Watching an enormous predator track a tiny moving silhouette is undeniably entertaining. However, the footage also raises interesting questions about what the animals can see and how they process visual information.
Why Would a Great White Shark Follow a Shadow?
Great white sharks (Carcharodon carcharias) are highly adapted predators that rely on several senses to navigate their surroundings and locate potential meals. Along with an excellent sense of smell and the ability to detect electrical signals produced by other animals, they use vision to identify and investigate objects in the water.
A moving shadow creates a noticeable change in brightness and contrast. These visual cues can be important to sharks because objects and animals often appear as silhouettes against the surrounding water, particularly when viewed from below.
In this case, the drone’s shadow may have presented an unfamiliar moving object worth investigating. The sharks did not need to recognize the drone or understand what created the shadow to respond to its movement.
Still, following a shadow is not proof that a shark considers it prey. The behavior could reflect an investigatory response, a reaction associated with hunting, or another motivation that cannot be established from the footage alone.
How Good Is a Great White Shark’s Eyesight?
Shark eyesight is more complicated than many people realize. Although great whites cannot necessarily distinguish fine visual details as clearly as humans, their visual systems are adapted to detecting important information in an underwater environment.
A 2021 study published in the Journal of the Royal Society Interface examined how juvenile white sharks might perceive the shapes and movements of objects at the ocean’s surface. Researchers analyzed visual information from the perspective of a shark looking upward at swimmers, surfers, and marine mammals.
The researchers found that the modeled visual differences between certain swimmers, surfers, and seals were small enough to support the possibility of mistaken identity in some shark bites. The findings highlighted the importance of movement and silhouette in how white sharks detect potential prey.
That research did not test reactions to drone shadows, and it does not establish why the sharks in Gauna’s video behaved as they did. Nevertheless, it helps explain why a relatively small change in light and movement could attract the attention of such a large predator.
Was the Shark Playing or Practicing Its Hunting Skills?
Adult great white sharks can grow to about 21 feet long.
©iStock.com/USO
At first glance, the shark’s reaction resembles a cat chasing a laser pointer. Both animals appear to become interested in something that moves unpredictably, even when there is no obvious food reward.
However, describing the shark’s behavior as play would be premature. Scientists generally distinguish play from ordinary hunting, exploration, and other goal-directed behaviors by considering the circumstances, repetition, and potential function of an animal’s actions. A short video of a shark following a shadow cannot establish those distinctions.
Great whites are opportunistic carnivores, and their hunting behavior changes as they mature. According to the California Department of Fish and Wildlife, juveniles primarily feed on fish, smaller sharks, and rays. Adults consume a wider range of prey, including seals, sea lions, fish, other sharks, and occasionally marine mammals and seabirds. They also scavenge whale blubber.
Detecting and responding to movement can be valuable for a predator, but it does not mean every moving object triggers an attempt to feed. Animals also investigate unfamiliar stimuli, and curiosity-like behavior does not always lead to hunting.
In Gauna’s footage, the sharks visibly respond to the shadow, but there is no clear evidence of a feeding attempt. The most defensible conclusion is that the moving visual cue attracted their attention and influenced their swimming behavior. Whether the response involved curiosity, a hunting-related instinct, or something else remains uncertain.
What Does This Behavior Reveal About Great White Sharks?
Perhaps the most revealing part of the footage is how readily the sharks respond to something that might seem insignificant to a human observer. From above, the drone’s shadow is merely a small dark shape moving across the water. To an animal navigating an environment filled with shifting light, motion, and potential prey, that change may be worth investigating.
The encounter also highlights an important consideration for wildlife filmmakers. Gauna ordinarily uses his drone to observe sharks without intentionally influencing their behavior. His shadow demonstration showed that even an aircraft flying above the water can introduce a visual stimulus capable of changing an animal’s movements.
That is one reason responsible wildlife observation involves more than keeping a physical distance. Photographers and drone operators should also consider whether their presence, noise, or shadows are disturbing the animals they hope to document.
Ultimately, the footage offers a different perspective on one of the ocean’s most recognizable predators. Great white sharks are powerful hunters, but they are also responsive animals that constantly gather information about their surroundings. Whether this particular response was curiosity, instinct, or something resembling play, it demonstrates that even a simple moving shadow can capture a great white shark’s attention.
