SHARK TOOLS, GUIDES & COMPARISONS
Compare shark size, identify a tooth, explore 571 living species or get a straight answer to the question that brought you here.
CLEAR, NOT COMPLICATED
Sources are there when you want them →
START HERE
TuffShark works best when you begin with a question, not a menu of hundreds of pages.
See length, weight, diet, habitat and bite evidence on one visual scale.
Build a matchup →02 / IDENTIFYFigure out which shark lost that toothFilter by shape, serrations, root, size and jaw position to narrow the match.
Start tooth ID →03 / EXPLOREGet a useful shark answerFrom the deepest shark to skin, senses, sleep, speed and great-white size.
Browse shark guides →POPULAR NOW
Similar length. Very different build.
Open →02 · Size questionBasking shark vs Whale sharkWhich gentle giant is bigger?
Open →03 · Size questionWhale shark vs Great white sharkThe filter feeder dwarfs the predator.
Open →04 · Deep-water pairGreenland vs Pacific sleeper sharkTwo cold-water mysteries compared.
Open →05 · Popular guideWhat is the deepest-living shark?Meet the record-holder and its rivals.
Open →06 · Popular guideWhat is the smallest shark?A shark that nearly fits in your hand.
Open →SHARK COMPARISON
Choose from 33 living and extinct sharks. The quick view gives you the big picture; each detailed matchup explains the differences.
Adult human
1.8 m · about 80 kg
The famous one
Carcharodon carcharias
Its headline bite number is a computer model, not a live-animal measurement.
The gentle giant
Rhincodon typus
The largest living fish is a filter feeder, so a predatory bite ranking would mislead.
Its headline bite number is a computer model, not a live-animal measurement. The largest living fish is a filter feeder, so a predatory bite ranking would mislead.
SHARK TOOTH IDENTIFIER
Use visible clues—not guesswork—to narrow a tooth to the best matches among 46 living and fossil profiles. No photo upload or account needed.
SHARK GUIDES
Interesting enough to keep reading, clear enough that you do not need a biology degree.
Real encounters tell a stranger story than a fantasy fight.
Read the story ↗How scientists age an animal born centuries ago.
Read the story ↗Follow the route—and the biology—between ocean and lake.
Read the story ↗SHARK SPECIES INDEX
Search every accepted living species by common name, scientific name, order or family—from tiny lanternsharks to the whale shark.
Explore all 571 species →BEYOND SHARKS
When you want to go deeper, explore trenches, currents, reefs, glowing animals and the forces that move the sea.
WHY TRUST TUFFSHARK?
We make the useful answer easy to find, then show where the numbers came from and where certainty runs out.
The strongest kind of evidence—and clearly labeled when it is available.
ModeledUseful science, but not the same as putting a sensor on a living shark.
EstimatedEspecially important for rare giants and animals known only from fossils.
SourcesFollow the source links instead of taking a mysterious internet number on faith.