SHARK VS SHARK

Lemon sharkvsSqualicorax

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

LivingNegaprion brevirostris×ExtinctSqualicorax pristodontus
QUICK VERDICT

Squalicorax is about 1.67× longer by these reference values.

Squalicorax uses a 5 m upper reference, compared with 3 m for Lemon 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
ALemon sharkcommonly to 3 m / 10 ft
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.

MeasureLemon sharkSqualicorax
Length referencecommonly to 3 m / 10 ftestimated to about 5 m / 16 ft
Weight referencereported to 250 kg / 551 lbNot reliably reconstructed
Bite forceNo dependable maximum foundUnknownNo defensible estimate usedUnknown
TimeShallow subtropical coasts and mangrovesabout 85–66 million years ago
DietFishes, rays and crustaceansFishes, marine reptiles and carrion
03

WHAT THE DATA CAN SAY

Size is not the whole animal.

Length and weight

Lemon shark is represented by commonly to 3 m / 10 ft; Squalicorax by estimated to about 5 m / 16 ft. The values are upper-end figures, not a typical adult profile. Body length and ecology are reconstructed from incomplete fossil evidence.

Bite evidence

Lemon shark: No standardized maximum is available for a fair cross-species comparison. 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

Decades of field research make this one of the best-studied coastal sharks. Serrated teeth and bite traces show a broad, opportunistic diet.

04

TRACE THE CLAIMS

Sources and limits.

Lemon sharkFlorida MuseumSqualicoraxPaleobiology DatabaseHow we standardize comparisonsRead the methodology →