How Many Teeth Does a Shark Have?
Up to 3,000 at once
Quick answer: 3,000 teeth at any given time. Keep reading for the full breakdown.
A shark can have up to 3,000 teeth in its mouth at any given time, arranged in multiple rows. Most sharks have 5-15 rows of teeth in each jaw. The front row does the biting; the rows behind are replacements, slowly rotating forward like a conveyor belt. When a front tooth breaks or falls out (which happens constantly), the next one moves into position within 24-48 hours.
Over a lifetime, a single shark may go through 20,000 to 30,000 teeth. Great whites replace their teeth roughly every 10-14 days. That is a new set of teeth every two weeks for a lifespan of 70+ years. If humans had this system, dentists would be out of business and the Tooth Fairy would be bankrupt.
Shark teeth are not set in bone like ours. They are embedded in the gum tissue and attached to a flexible cartilage jaw. This makes them easier to lose but also easier to replace. The teeth are coated in fluorapatite, which is harder than human enamel and resistant to acid. Sharks essentially have self-sharpening, self-replacing, acid-proof teeth. Evolution does not mess around with apex predators.
Teeth by shark species
| Species | Teeth at once | Rows | Tooth shape | Diet |
|---|---|---|---|---|
| 🦈 Great White | ~300 | 5-7 | Triangular, serrated | Seals, fish, sea lions |
| 🦈 Bull Shark | ~350 | 7-10 | Broad, triangular | Fish, dolphins, anything |
| 🦈 Tiger Shark | ~350 | 5-6 | Curved, serrated ("can opener") | Everything (license plates found in stomachs) |
| 🦈 Hammerhead | ~350 | 5-7 | Triangular, smooth | Stingrays, fish, squid |
| 🐋 Whale Shark | ~3,000 | 10-15 | Tiny (6mm), vestigial | Plankton (filter feeder, teeth unused) |
| 🦈 Mako Shark | ~240 | 3-4 | Long, thin, curved | Fast fish (tuna, swordfish) |
| 🦈 Nurse Shark | ~300 | 5-6 | Flat, crushing | Shellfish, crustaceans, coral |
Shark vs human teeth
| Feature | 🦈 Shark | 🦷 Human |
|---|---|---|
| Teeth in lifetime | 20,000-30,000 | 52 (20 baby + 32 adult) |
| Replacement | Continuous, every 1-2 weeks | Once (baby to adult) |
| Rows | 5-15 rows | 1 row |
| Attached to | Gum tissue (cartilage jaw) | Bone sockets |
| Coating | Fluorapatite (harder) | Enamel |
| Cavities | Impossible (no sugar diet, acid-proof) | Very common |
Fossil teeth
Shark teeth are by far the most common shark fossil because the rest of a shark's body is cartilage, which rarely fossilizes. Megalodon teeth (the giant prehistoric shark) can be 18 cm (7 inches) long. Collectors pay hundreds to thousands of dollars for well-preserved Megalodon teeth. Since a single Megalodon went through an estimated 40,000 teeth in its lifetime, and the species existed for 20 million years, there are a LOT of Megalodon teeth on the ocean floor. Most beaches along the US East Coast, particularly in South Carolina and Florida, regularly yield fossil shark teeth.
Join the conversation
Already have an account? Log in