SHARK VS SHARK

Dwarf lanternsharkvsOtodus obliquus

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×ExtinctOtodus obliquus
QUICK VERDICT

Otodus obliquus is about 43× longer by these reference values.

Otodus obliquus uses a 9.1 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
BOtodus obliquusestimated to about 9.1 m / 30 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 lanternsharkOtodus obliquus
Length referenceabout 0.21 m / 8.3 inestimated to about 9.1 m / 30 ft
Weight referencerough reference about 0.2 kg / 0.4 lbNot reliably reconstructed
Bite forceNo dependable maximum foundUnknownNo defensible estimate usedUnknown
TimeDeep Caribbean slopesabout 56–45 million years ago
DietSmall crustaceans and fishesLarge fishes and marine vertebrates
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; Otodus obliquus by estimated to about 9.1 m / 30 ft. Tiny sample sizes make the exact maximum provisional. Soft-body dimensions are inferred from teeth and living analogues.

Bite evidence

Dwarf lanternshark: No standardized maximum is available. Otodus obliquus: No species-specific model 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

One of the smallest known sharks also produces light. It belonged to the megatooth lineage that later produced megalodon.

04

TRACE THE CLAIMS

Sources and limits.

Dwarf lanternsharkSmithsonian OceanOtodus obliquusPaleobiology DatabaseHow we standardize comparisonsRead the methodology →