The early August fishing trip was meant to be routine: calm seas, a couple of friends, and hopes of a good catch. Instead, one Californian paddler ended up with a front-row seat to one of nature’s most feared predators, and a video clip that is now racing around social media.
A peaceful fishing trip turns unnerving
On 6 August 2024, history and science teacher Ian Walters headed out in a kayak with a friend off Half Moon Bay, a chilly stretch of coastline south of San Francisco. The pair were targeting fish in the rolling Pacific swells, several hundred metres from shore.
The conditions were classic Northern California: overcast skies, a light wind and water cold enough to numb fingers in minutes. The two men had already hooked a few fish, with the usual splashing, thrashing and, quite possibly, a bit of blood in the water.
That activity, Walters now believes, was precisely what drew in an uninvited observer.
For several tense minutes, a large shark shadowed the kayak, its dorsal fin slicing the surface just metres away.
Walters grabbed his camera and filmed as the animal paced them. The footage shows a grey fin and tail cutting through the water, keeping steady alongside the kayak like a submarine escort.
A brief but chilling pursuit caught on video
Speaking later to local television stations, Walters said he estimated the shark’s length at between 3.9 and 4.2 metres (roughly 13 to 14 feet). As a teacher used to measuring and explaining things for Year 6 pupils, he focused on the distance between the dorsal fin and the tail to reach that figure.
The clip does not show the entire body of the shark, so there is no absolute confirmation of the species. Yet the size, shape and behaviour strongly suggest a great white shark, known scientifically as Carcharodon carcharias.
Despite the impressive size of the animal, both men later said they never felt that it truly intended to attack.
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“The experience was mostly surreal,” Walters said in a TV interview, describing the shark as “the apex of the apex predators”.
From his point of view, the shark seemed more curious – and possibly hungry – than aggressive. It followed for a short while, then lost interest and glided off toward a group of nearby sea lions, a far more substantial meal than two plastic kayaks and a couple of wary humans.
Why a great white might follow a kayak
A predator attracted by easy opportunities
Sharks are highly attuned to signals of potential food. Fishing activity, especially when a catch is struggling, can send out exactly the right combination of cues:
- splashes from hooked fish
- low-frequency vibrations from movement
- traces of blood or bodily fluids in the water
- unusual silhouettes at the surface, including boats and kayaks
For a shark cruising the coastline, this mix can look like an easy opportunity. But that does not automatically mean an attack on humans is on the cards. In coastal waters where sharks are relatively common, many such interactions end exactly as Walters’ did: brief approach, inspection, and then a departure once the shark realises it has better options.
Half Moon Bay sits on a shark highway
The central California coast is part of a well-known range for great white sharks. They are also found off Australia, South Africa, Namibia and the southeastern United States, including Florida. In these regions, they often patrol zones rich in seals and sea lions, which form a crucial part of their diet.
Scientists have documented seasonal patterns off California, with larger great whites frequenting so-called “hotspots” like the Farallon Islands and Año Nuevo. Half Moon Bay lies along the same productive coastal corridor. So while the encounter looks like something out of a shark thriller, marine biologists see it as entirely consistent with the normal ecology of the species.
How big was the shark really?
Walters’ estimate of around 4 metres fits neatly within the known size range of male great white sharks. Typically:
| Category | Typical length |
|---|---|
| Adult male great white | 3.4–4.0 m |
| Adult female great white | 4.6–4.9 m |
| Exceptionally large individuals | 6 m or more |
Legendary sharks like “Deep Blue”, estimated at over 6 metres and roughly 2.5 tonnes, sit at the extreme upper edge. The animal shadowing the kayak was large enough to intimidate, but did not appear to be a record-breaker.
Are great white sharks really a threat to humans?
Decades of films and sensational headlines have painted the great white shark as an unthinking killer. The “Jaws” franchise in particular reset how a generation felt about going into the sea.
Marine scientists paint a very different picture. Great whites are top predators in their ecosystems, but attacks on people remain rare. Many involve a single investigative bite rather than repeated feeding. In other words, the shark tests something unfamiliar, then lets go when it realises this is not its usual prey.
Statistically, the odds of being bitten by any shark in your lifetime are estimated at around 1 in 4.3 million.
According to the International Shark Attack File (ISAF), global figures for 2023 show 69 recorded unprovoked shark bites worldwide, with 10 resulting in fatalities. Those numbers cover all shark species, not just great whites.
By contrast, everyday animals that most people barely notice are responsible for far more deaths each year.
- Mosquitoes: 700,000 to 1,000,000 deaths annually (mainly from diseases such as malaria and dengue)
- Freshwater snails: around 200,000 deaths (through parasitic infections like schistosomiasis)
- Venomous snakes such as the saw-scaled viper: roughly 138,000 deaths
- Assassin bugs (reduviids): about 10,000 deaths, largely from Chagas disease
- Scorpions: around 2,600 deaths
Humans themselves are responsible for hundreds of thousands of violent deaths per year, putting our own species far ahead of sharks when it comes to lethality.
Shark, fear and what really happens in the water
Our instinctive fear of sharks remains powerful. Dark water and unseen shapes beneath the surface tap straight into primal anxiety. Encounters like the one filmed at Half Moon Bay therefore spread quickly online: they play into a deep narrative of humans versus ocean predators.
At the same time, accounts from people who have actually shared the water with great whites often sound surprisingly calm. Walters, for instance, rejected the “mindless killer” stereotype when speaking to local media. He called the meeting “magical” and stressed that these animals play a crucial role in the ocean’s balance.
By preying on weak or sick individuals, apex predators like great whites help maintain the health of marine populations. Remove them, and entire ecosystems can shift, sometimes in ways that reduce fish stocks or harm coral reefs.
What kayakers and surfers can realistically do
Encounters with large sharks off California, Australia or South Africa will never drop to zero. For people who spend time on the water, the aim is to reduce risk, not pretend it does not exist. Marine safety organisations often repeat a few evidence-based tips:
- Avoid paddling or surfing alone in remote spots, especially at dawn or dusk.
- Stay clear of areas with active seal or sea lion colonies, where sharks naturally hunt.
- Keep bleeding fish out of the water and avoid dangling catches over the side of a kayak.
- Resist the urge to touch or harass wildlife, including sharks, if one appears nearby.
- If you see a shark, stay calm, maintain eye contact if possible, and paddle steadily toward shore without frantic splashing.
Such guidance does not guarantee safety, but it nudges the odds further in favour of the humans – already heavily favoured by the statistics.
Understanding “apex predator” and what it really means
The term “apex predator” is often used in dramatic headlines, but in ecological terms it has a specific meaning. An apex predator sits at the very top of the food chain, with no natural predators of its own once fully grown. Great whites share that status with animals like orcas, lions and polar bears.
Being an apex predator does not mean constant aggression or endless hunting. These animals spend much of their time cruising or resting, conserving energy. Their big role lies in influencing the behaviour and numbers of prey species, shaping how entire habitats function.
Events like the Half Moon Bay encounter give a rare glimpse of that reality. Instead of a crazed monster, the shark appears as a large, wary, opportunistic hunter, weighing up whether two small boats are worth its time – and ultimately deciding they are not.