SHARK VS SHARK

SqualicoraxvsZebra shark

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

ExtinctSqualicorax pristodontus×LivingStegostoma tigrinum
QUICK VERDICT

Squalicorax is about 1.41× longer by these reference values.

Squalicorax uses a 5 m upper reference, compared with 3.54 m for Zebra 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
ASqualicoraxestimated to about 5 m / 16 ft
BZebra sharkreported to 3.54 m / 11.6 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.

MeasureSqualicoraxZebra shark
Length referenceestimated to about 5 m / 16 ftreported to 3.54 m / 11.6 ft
Weight referenceNot reliably reconstructedlarge-adult reference about 35 kg / 77 lb
Bite forceNo defensible estimate usedUnknownNo dependable maximum foundUnknown
Timeabout 85–66 million years agoTropical Indo-Pacific reefs and sand flats
DietFishes, marine reptiles and carrionMollusks, crustaceans and fishes
03

WHAT THE DATA CAN SAY

Size is not the whole animal.

Length and weight

Squalicorax is represented by estimated to about 5 m / 16 ft; Zebra shark by reported to 3.54 m / 11.6 ft. Body length and ecology are reconstructed from incomplete fossil evidence. Its very long tail adds substantially to total length.

Bite evidence

Squalicorax: Bite traces show feeding, not maximum force. Zebra shark: No standardized maximum is used.

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

Serrated teeth and bite traces show a broad, opportunistic diet. Juveniles have stripes; adults are spotted despite the common name.

04

TRACE THE CLAIMS

Sources and limits.

SqualicoraxPaleobiology DatabaseZebra sharkFlorida MuseumHow we standardize comparisonsRead the methodology →