SHARK SCIENCE WITH A PULSE
The ocean is full of legends. We follow the evidence behind giant bites, impossible lifespans and predators that refuse to stay where we expect them.
NO HORROR. NO HYPE.
See our evidence standard →
THE LAB
Investigations, quick science answers and practical tools—with a visible line between what scientists measured and what headlines repeated.
Real encounters reveal a rivalry stranger than the fantasy matchup.
Open the research file ↗The eye-lens evidence behind the Greenland shark’s astonishing age.
Open the research file ↗Following the rivers, locks and biology between ocean and lake.
Open the research file ↗INTERACTIVE SIZE LAB
Choose two sharks and see their reported maximum lengths on the same scale. Maximum records are not typical adult size.
Adult human
1.8 m / 5 ft 11 in
The famous one
Carcharodon carcharias
Maximum size is estimated; the best-known very high bite-force figures come from biomechanical modeling.
The gentle giant
Rhincodon typus
NOAA describes a 12.2 m upper size; outsized historical claims deserve caution.
Some bite-force figures are computer models—not live measurements. The largest fish alive feeds by filtering tiny prey from seawater.
THE LIVING SHARK INDEX
From lanternsharks that fit in your hand to whale sharks longer than a school bus. Search every accepted living species by name, order or family.
Explore all 571 species →START WITH THE ICONS
The researched comparison collection starts with familiar species and labels every uncertain number.
THE TUFFSHARK STANDARD
Sharks are difficult to study. When the evidence has limits, our labels show them instead of hiding them.
A researcher measured the animal or behavior using a described method.
ModeledA result produced from anatomy, physics or a statistical model—not a direct test.
EstimatedThe best evidence supports an interval with acknowledged uncertainty.
ReportedA credible source reports it, but the figure may be unusual or hard to verify.