SHARK VS SHARK

Cookiecutter sharkvsGreat hammerhead

Length, weight and bite evidence—plus context from a human, city bus and blue whale. Every number below carries its uncertainty with it.

LivingIsistius brasiliensis×LivingSphyrna mokarran
QUICK VERDICT

Great hammerhead is about 11× longer by these reference values.

Great hammerhead uses a 6.1 m upper reference, compared with 0.56 m for Cookiecutter shark. Great hammerhead's weight reference is about 90× heavier.

01

ON THE SAME SCALE

Human. Bus. Whale.
Pick your reference.

RELATIVE LENGTH · 0–24 METERS
ACookiecutter sharkabout 0.56 m / 22 in
BGreat hammerheadreported to 6.1 m / 20 ft
REFAdult human1.8 m · about 80 kg

Length bars use upper comparison values and do not show body depth, tail proportion or typical adult size. A long thresher tail, for example, does not equal whale-shark body mass.

02

THE NUMBERS

Side by side.

MeasureCookiecutter sharkGreat hammerhead
Length referenceabout 0.56 m / 22 inreported to 6.1 m / 20 ft
Weight referencelarge-adult reference about 5 kg / 11 lbrecorded to about 450 kg / 991 lb
Bite forceNo dependable maximum foundUnknownNo dependable maximum foundUnknown
HabitatDeep tropical and subtropical oceansTropical coastal and offshore waters
DietPlugs of tissue from larger animals plus small preyRays, fish and smaller sharks
03

WHAT THE DATA CAN SAY

Size is not the whole animal.

Length and weight

Cookiecutter shark is represented by about 0.56 m / 22 in; Great hammerhead by reported to 6.1 m / 20 ft. Weight is a rounded comparison reference. The comparison uses the largest reported length and a record mass.

Bite evidence

Cookiecutter shark: Bite shape is documented; a comparable force maximum is not. Great hammerhead: Comparative biomechanics exist, but a simple verified maximum is not established here.

Living versus extinct

Both species are living, but record-sized individuals are rare. These upper references should not be read as normal adult size.

Ecology changes the matchup

Its bite removes a round plug; size alone does not predict ecological impact. Its wide head is a sensory platform, not just an unusual silhouette.

04

TRACE THE CLAIMS

Sources and limits.

Cookiecutter sharkSmithsonian OceanGreat hammerheadFlorida MuseumHow we standardize comparisonsRead the methodology →