SHARK VS SHARK

Dwarf lanternsharkvsSqualicorax

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

LivingEtmopterus perryi×ExtinctSqualicorax pristodontus
QUICK VERDICT

Squalicorax is about 24× longer by these reference values.

Squalicorax uses a 5 m upper reference, compared with 0.21 m for Dwarf lanternshark. 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
ADwarf lanternsharkabout 0.21 m / 8.3 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.

MeasureDwarf lanternsharkSqualicorax
Length referenceabout 0.21 m / 8.3 inestimated to about 5 m / 16 ft
Weight referencerough reference about 0.2 kg / 0.4 lbNot reliably reconstructed
Bite forceNo dependable maximum foundUnknownNo defensible estimate usedUnknown
TimeDeep Caribbean slopesabout 85–66 million years ago
DietSmall crustaceans and fishesFishes, marine reptiles and carrion
03

WHAT THE DATA CAN SAY

Size is not the whole animal.

Length and weight

Dwarf lanternshark is represented by about 0.21 m / 8.3 in; Squalicorax by estimated to about 5 m / 16 ft. Tiny sample sizes make the exact maximum provisional. Body length and ecology are reconstructed from incomplete fossil evidence.

Bite evidence

Dwarf lanternshark: No standardized maximum is available. 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

One of the smallest known sharks also produces light. Serrated teeth and bite traces show a broad, opportunistic diet.

04

TRACE THE CLAIMS

Sources and limits.

Dwarf lanternsharkSmithsonian OceanSqualicoraxPaleobiology DatabaseHow we standardize comparisonsRead the methodology →