Shark Trivia: 30 Questions and Answers for Shark Week

Shark Week 2026 runs July 26 to August 1 on Discovery, with 20 new specials airing nightly from 8 p.m. ET and streaming on HBO Max and Discovery+. Below are 30 shark trivia questions and answers covering biology, records, megalodon, and what the 2025 bite statistics actually say.

If you would rather be tested than read, play Ocean & Marine Life Trivia Quiz first. It is ten questions on whales, sharks, and the stranger residents of the deep, free and with no signup. For a broader animal round try Animal Facts: True or False?, and if you want a personality result rather than a score, What Animal Are You? runs on the same theme. Every question below has its answer immediately after it, so the list works as a quiz-night round or a Shark Week refresher.

Shark Week and sharks on screen

1. When did Shark Week first air on Discovery? In 1988. It has returned every summer since, making it one of the longest-running programming events on cable television.

2. What are the Shark Week 2026 dates? July 26 to August 1, 2026, with 20 new specials premiering nightly at 8 p.m. ET.

3. Which 1975 film is responsible for the modern fear of sharks? Jaws, directed by Steven Spielberg and adapted from Peter Benchley's 1974 novel.

4. What did the author of Jaws spend his later career doing? Peter Benchley became a shark conservation advocate, and said publicly that he could not have written the same novel knowing what is now understood about shark behaviour and shark populations.

5. Which long-running Shark Week franchise follows great whites breaching off South Africa? Air Jaws, which returns in 2026 as Air Jaws: Red, White and Breach.

Shark biology basics

6. Are sharks fish? Yes. They are cartilaginous fish in the class Chondrichthyes, meaning their skeletons are made of cartilage rather than bone.

7. What are shark scales called? Dermal denticles, tiny tooth-like scales that reduce drag and make shark skin feel like sandpaper when rubbed the wrong way.

8. Sharks have no swim bladder, so what keeps them from sinking? A very large oily liver, rich in a compound called squalene, which is less dense than seawater.

9. Which sense organ lets a shark detect the electrical fields given off by other animals? The ampullae of Lorenzini, a network of jelly-filled pores clustered around the snout.

10. How many teeth does a shark go through in a lifetime? Thousands. Teeth grow in rows and rotate forward as older ones break off, so a single shark can shed and replace teeth continuously for decades.

Record holders

11. What is the largest fish in the ocean? The whale shark, which can exceed 12 metres, about 40 feet, and feeds almost entirely on plankton and small fish.

12. What is the second-largest fish? The basking shark, another filter feeder that swims with its mouth open rather than hunting.

13. Which shark is the fastest swimmer? The shortfin mako, with burst speeds usually cited around 45 mph, or 70 km/h. Higher figures circulate but are poorly documented.

14. Which shark is the longest-lived vertebrate on Earth? The Greenland shark, one specimen of which was dated to roughly 392 years old.

15. What is the smallest known shark? The dwarf lanternshark, an adult of which is roughly 7 to 8 inches long and glows faintly in deep water.

The strange specialists

16. Which shark hunts by whipping prey with its tail? The thresher shark, whose upper tail lobe can be about as long as the rest of its body and is used to stun schooling fish.

17. Which deep-sea shark can shoot its jaws forward out of its head? The goblin shark, which extends highly protrusible jaws to grab prey it cannot chase down.

18. Which small shark takes round plugs of flesh out of much larger animals? The cookiecutter shark, which leaves circular wounds on whales, tuna, and occasionally submarines.

19. Why is a hammerhead's head shaped like that? The cephalofoil spreads the shark's eyes and electroreceptors further apart, widening its field of view and its sensory coverage of the seafloor. Some species also use it to pin stingrays.

20. Which shark can swim far up rivers into fresh water? The bull shark, recorded well up the Mississippi River and resident in Lake Nicaragua.

Megalodon and deep time

21. When did megalodon go extinct? Roughly 3.6 million years ago, which means it never shared the planet with humans.

22. How large does the most recent research say megalodon grew? A 2025 study involving 29 fossil shark researchers estimated up to about 24.3 metres, roughly 80 feet, and around 94 tons.

23. What did that study change about how megalodon looked? It argued the body was slender rather than stocky, closer in proportion to a lemon shark than to a scaled-up great white.

24. Why are megalodon fossils almost always teeth? Cartilage rarely fossilises, so teeth and occasional vertebrae are nearly all that survives. The largest megalodon teeth exceed 7 inches.

25. Are sharks older than trees? Yes. Shark ancestors appear in the fossil record more than 400 million years ago, before the first true trees.

Sharks and people: the actual numbers

26. How many unprovoked shark bites were recorded worldwide in 2025? 65, according to the International Shark Attack File, up from 47 in 2024 but in line with the five-year average of 61.

27. How many of those bites were fatal? Nine unprovoked fatalities, out of 12 shark-bite-related deaths in total. The five-year average is about eight unprovoked fatalities a year.

28. Which country records the most unprovoked bites? The United States, and within it Florida, largely a function of how many people enter the water there rather than how many sharks are present.

29. Roughly how many sharks do humans kill each year? Recent estimates run to around 80 million annually, with older figures closer to 100 million, driven mostly by fishing bycatch and the fin trade.

30. What is the longest a great white shark has survived on public display? 198 days, at the Monterey Bay Aquarium in 2004 and 2005. The shark was released back into Monterey Bay after it outgrew the exhibit and began preying on other fish, and the record still stands.

How to use these as a quiz round

Thirty questions is about twice what most pub rounds need, so split them. Sections one and six work as an opener and a closer for a general audience, because the Shark Week and bite-statistics questions do not require any marine biology. Sections three, four, and five are the harder set, and the megalodon questions in particular tend to catch people out, since the sizes most players remember come from films rather than from the 2025 research.

If you would rather score yourself than run the round, Ocean & Marine Life Trivia Quiz covers the same territory in ten scored questions, and Animal Facts: True or False? widens it beyond the water.

Frequently asked questions

When is Shark Week 2026 and where can you watch it?

Shark Week 2026 runs from Sunday, July 26 through Saturday, August 1 on Discovery, with 20 new specials premiering nightly from 8 p.m. ET. Episodes stream on HBO Max and Discovery+, and the week is also carried by live TV services including Philo and YouTube TV. Titles this year include KPop Shark Heroes with Ken Jeong, Air Jaws: Red, White and Breach, and Jaws vs. Orca.

How many people are actually bitten by sharks each year?

The International Shark Attack File logged 65 unprovoked bites worldwide in 2025, up from 47 in 2024 but in line with the five-year average of 61 and below the ten-year average of 72. Nine of those bites were fatal, against a five-year average of about eight fatalities a year. The United States records more unprovoked bites than any other country, and Florida records more than any other US state.

How big was the megalodon?

A 2025 study involving 29 fossil shark researchers put the upper end at roughly 24.3 metres, about 80 feet, and around 94 tons. That is larger than earlier estimates, but the same study argued megalodon was built on a slender frame closer to a lemon shark than a scaled-up great white, so it was long rather than simply bulky.

What is the oldest shark ever recorded?

A female Greenland shark radiocarbon-dated through the lens of her eye was estimated at about 392 years old, within a range of 272 to 512 years. That makes the Greenland shark the longest-lived vertebrate known, ahead of the bowhead whale at 211 years. The species is not thought to reach sexual maturity until roughly age 150.

Are sharks older than trees?

Yes. Shark ancestors show up in the fossil record more than 400 million years ago, while the first true trees appear roughly 385 to 350 million years ago. Sharks have survived all five mass extinction events since, which is why the group is often described as one of evolution's most durable designs.