SHARK VS SHARK

Cookiecutter sharkvsSqualicorax

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×ExtinctSqualicorax pristodontus
QUICK VERDICT

Squalicorax is about 8.9× longer by these reference values.

Squalicorax uses a 5 m upper reference, compared with 0.56 m for Cookiecutter shark. A clean mass ratio is not shown because at least one weight is not reliably reconstructed.

01

ON THE SAME SCALE

Human. Bus. Whale.
Pick your reference.

RELATIVE LENGTH · 0–24 METERS
ACookiecutter sharkabout 0.56 m / 22 in
BSqualicoraxestimated to about 5 m / 16 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 sharkSqualicorax
Length referenceabout 0.56 m / 22 inestimated to about 5 m / 16 ft
Weight referencelarge-adult reference about 5 kg / 11 lbNot reliably reconstructed
Bite forceNo dependable maximum foundUnknownNo defensible estimate usedUnknown
TimeDeep tropical and subtropical oceansabout 85–66 million years ago
DietPlugs of tissue from larger animals plus small preyFishes, marine reptiles and carrion
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; Squalicorax by estimated to about 5 m / 16 ft. Weight is a rounded comparison reference. Body length and ecology are reconstructed from incomplete fossil evidence.

Bite evidence

Cookiecutter shark: Bite shape is documented; a comparable force maximum is not. Squalicorax: Bite traces show feeding, not maximum force.

Living versus extinct

At least one animal is known from fossils. Fossil length, weight and bite estimates depend on which living analogues and scaling equations researchers choose.

Ecology changes the matchup

Its bite removes a round plug; size alone does not predict ecological impact. Serrated teeth and bite traces show a broad, opportunistic diet.

04

TRACE THE CLAIMS

Sources and limits.

Cookiecutter sharkSmithsonian OceanSqualicoraxPaleobiology DatabaseHow we standardize comparisonsRead the methodology →