SHARK VS SHARK

Cookiecutter sharkvsHorn shark

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×LivingHeterodontus francisci
QUICK VERDICT

Horn shark is about 2.2× longer by these reference values.

Horn shark uses a 1.22 m upper reference, compared with 0.56 m for Cookiecutter shark. Horn shark's weight reference is about 2.0× heavier.

01

ON THE SAME SCALE

Human. Bus. Whale.
Pick your reference.

RELATIVE LENGTH · 0–24 METERS
ACookiecutter sharkabout 0.56 m / 22 in
BHorn sharkreported to 1.22 m / 4 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 sharkHorn shark
Length referenceabout 0.56 m / 22 inreported to 1.22 m / 4 ft
Weight referencelarge-adult reference about 5 kg / 11 lblarge-adult reference about 10 kg / 22 lb
Bite forceNo dependable maximum foundUnknown128–338 N theoretical, depending on tooth positionModeled
HabitatDeep tropical and subtropical oceansRocky eastern Pacific reefs
DietPlugs of tissue from larger animals plus small preyUrchins, crabs and mollusks
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; Horn shark by reported to 1.22 m / 4 ft. Weight is a rounded comparison reference. Weight is a rounded adult reference.

Bite evidence

Cookiecutter shark: Bite shape is documented; a comparable force maximum is not. Horn shark: Experiments also measured bites; the displayed range is the study's theoretical maximum from front to rear teeth.

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 rear teeth crush hard prey, and its bite mechanics have been tested directly and modeled.

04

TRACE THE CLAIMS

Sources and limits.

Cookiecutter sharkSmithsonian OceanHorn sharkHuber et al. (2005)How we standardize comparisonsRead the methodology →