Are tiger sharks dangerous? Both answers are true
Tiger sharks (Galeocerdo cuvier) rank second to the great white for recorded attacks on people. For a diver on a managed dive, the risk is very low. Both statements are true, and they describe different situations.
Most shark incidents happen at the surface, with swimmers and surfers, where a human silhouette can look like a seal or a turtle. Underwater, divers can keep the sharks in view, and a guide runs the encounter. Incidents involving tiger sharks are rare in the history of scuba diving, compared with the thousands of safe encounters every year in places like Tiger Beach and the Maldives.
Tiger sharks hunt mostly at dawn, dusk and night. By day, when most recreational diving happens, they are generally slow-moving and inquisitive rather than predatory. Marine biologists call them opportunistic: they investigate new objects in their environment. Aggression is unusual unless the shark feels cornered, or there is a feeding frenzy involving many species.
They also do a job. Often called the "waste baskets" of the ocean, they help keep coral reefs and seagrass beds healthy by removing the weak and sick.
As a shark guide myself for many years in Aliwal Shoal, South Africa, I have conducted and led 100's of dives with tiger sharks and never had any issues, give I followed the right protocols.
Manie Eksteen, PADI Staff Instructor
The rules below are the ones guides most often brief.
Tiger sharks by the numbers
| Fact | Tiger shark |
|---|---|
| Typical length | 3.25–4.25 m, and up to about 5.5 m |
| Typical weight | 385–635 kg, and over 900 kg for the largest |
| Diet | The least fussy feeder of any shark: turtles, rays, other sharks, fish, seabirds, dolphins and carrion |
| Range | Tropical and temperate seas worldwide, except the Mediterranean |
| Unprovoked bites on record | 142, of which 39 were fatal (ISAF species table, updated January 2022) |
| Conservation status | Near Threatened (Florida Museum profile) |
The bite record runs from 1580 and counts only species that were confirmed. Species are hard to assign in some bites, so treat the counts as a guide, not an exact tally.
Tiger, bull or great white?
Great whites lead the bite record, tigers come second, and bull sharks are the third of the three species most often implicated.
| Shark | Size | Unprovoked bites on record | Where it lives |
|---|---|---|---|
| Tiger shark | 3.25–4.25 m, up to about 5.5 m | 142, 39 fatal | Tropical and temperate seas |
| Bull shark | Up to about 3.4 m, and 4 m at most | 119, 26 fatal | Warm coastal water, estuaries and rivers |
| Great white shark | Up to about 6 m | 351, 59 fatal | Mostly temperate seas |
Not the same animal. The sand tiger shark, called the spotted ragged-tooth in South Africa and the grey nurse in Australia, is a different species. It grows to about 3.2 m, has a mouthful of ragged-looking teeth and is not aggressive unless provoked. ISAF lists 36 unprovoked sand tiger bites on people, none fatal.
Five rules for a safe tiger shark dive
Every shark dive starts with a briefing, and the briefing comes before anything on this page. Where your guide's rules differ from these, follow your guide.
- Follow the dive briefing. Listen carefully to your dive master or shark guide. They know the local individuals and their temperaments, and each site has its own rules.
- Keep your hands in. Don't touch, feed or chase the sharks. Keep your arms tucked or close to your chest to avoid accidental nips during a close pass.
- Dive in a group. Stay with your guide and your buddy, and never wander off for a better view.
- Keep the sharks in view. Turn as they pass, so nothing approaches from behind, and stay in control of your buoyancy. Kneel or hover as the briefing says.
- Keep your gear streamlined. Take off shiny jewellery and tuck away gauges and octopus hoses so they don't dangle and attract attention. Many shark divers prefer dark-coloured gear and avoid "yum-yum yellow" or bright fins that might mimic the flash of baitfish.
A reliable way to track depth and time matters when big animals have your attention. See How to choose your first dive computer.
Where to meet tiger sharks, and when
Safe encounters depend on the location and the professionalism of the dive operator.
| Place | When | What to expect |
|---|---|---|
| Tiger Beach, Bahamas | All year, at their best from October to March | Perhaps the most famous spot: shallow, clear water where you can watch these sharks in a controlled environment |
| Fuvahmulah, Maldives | All year, with the clearest water from December to April | A unique island in the south of the archipelago, where tiger sharks are seen daily |
| Aliwal Shoal, South Africa | From December, at their best from December to March | Tiger sharks arrive in the warm months, after the ragged-tooth season |
| Beqa Lagoon, Fiji | Bull sharks all year. Tigers are occasional, from June to October | Known for intense bull and tiger shark feeds |
| Raja Ampat, Indonesia | No season | More famous for biodiversity; tiger sharks are occasional sightings |
In December, Fuvahmulah, Tiger Beach and Aliwal Shoal are all at their best, though Fuvahmulah and Tiger Beach have few liveaboard sailings then. The best liveaboard destinations in December says which boats and weeks to look at, and the January guide covers Fuvahmulah, Tiger Beach and Bimini's great hammerheads.
Planning Fuvahmulah? See what wetsuit thickness you need in the Maldives. Weighing a boat against a resort at Raja Ampat? See Raja Ampat liveaboard vs resort.
How dangerous are we to them?
While we ask if tiger sharks are dangerous, we should also ask how dangerous humans are to sharks. Millions of sharks are killed every year for the fin trade, and tiger sharks are listed as Near Threatened. Responsible shark tourism gives local communities an economic incentive to protect these animals rather than hunt them.
When you dive with tiger sharks, you become an ambassador for their survival. Support the local operators who back this.
Questions
Are tiger sharks aggressive to humans?
Rarely toward divers. They are opportunistic and curious, and aggression is unusual unless the shark feels cornered or there is a feeding frenzy involving many species. Tiger sharks do bite people, so respect their space and read their body language.
Will tiger sharks attack divers?
Very rarely on a managed dive. Most shark bites on people involve swimmers and surfers at the surface, and tiger sharks are generally slow and inquisitive by day. The risk is not zero: they are large predators, and a bite from one could be serious. Follow the briefing and stay with your group.
How many people have tiger sharks killed?
The International Shark Attack File lists 142 unprovoked tiger shark bites on people, 39 of them fatal. The record runs from 1580, so it spans more than four centuries. Species are hard to assign in some bites, so treat the counts as a guide, not an exact tally.
How big do tiger sharks get?
Tiger sharks typically reach 3.25–4.25 m and weigh 385–635 kg. The largest are over 5.5 m and are estimated at more than 900 kg. Great whites grow larger, to about 6 m, and bull sharks are smaller, growing to about 3.4 m.
What do tiger sharks eat?
Almost anything. Tiger sharks are the least fussy feeders of any shark, and eat turtles, rays, other sharks, bony fish, seabirds, dolphins and carrion. What they take varies by region. They hunt mostly at dawn, dusk and night, and by day they are generally slow and inquisitive.
Are tiger sharks endangered?
Tiger sharks are listed as Near Threatened, which means they are not at high risk of extinction now but are close to qualifying for a higher category. Slow breeding and fishing pressure are the concerns. Shark tourism that pays communities to protect them helps.
Where are tiger sharks found?
In tropical and temperate seas around the world, except the Mediterranean. Divers meet them at Tiger Beach in the Bahamas, at Fuvahmulah in the Maldives and at Aliwal Shoal in South Africa. They are occasional sightings at Raja Ampat in Indonesia.
Are there tiger sharks in the Red Sea?
Yes, but the Red Sea's dive sites are known for oceanic whitetips and hammerheads, not tigers. In June 2023 a tiger shark killed a man swimming off Hurghada, and Egypt's environment ministry confirmed the species. Follow local swimming warnings, and see the Red Sea guide.
When are tiger sharks most active?
At dawn, dusk and night, when they hunt. During the day, when most recreational diving happens, they are generally slow-moving and inquisitive rather than predatory. Ask your guide how the sharks have been behaving at the site on the day you dive.
Is it safe to dive with tiger sharks?
Yes, on a managed dive with a professional operator. Dive within your training, follow the briefing and the five rules above, and stay with your group. The risk to a diver is very low but not zero, and these are large, powerful animals.