SHARK VS SHARK

Frilled sharkvsOtodus obliquus

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

LivingChlamydoselachus anguineus×ExtinctOtodus obliquus
QUICK VERDICT

Otodus obliquus is about 4.5× longer by these reference values.

Otodus obliquus uses a 9.1 m upper reference, compared with 2 m for Frilled 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
AFrilled sharkabout 2 m / 6.6 ft
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.

MeasureFrilled sharkOtodus obliquus
Length referenceabout 2 m / 6.6 ftestimated to about 9.1 m / 30 ft
Weight referencelarge-adult reference about 15 kg / 33 lbNot reliably reconstructed
Bite forceNo dependable maximum foundUnknownNo defensible estimate usedUnknown
TimeDeep continental slopesabout 56–45 million years ago
DietSquid, fishes and small sharksLarge fishes and marine vertebrates
03

WHAT THE DATA CAN SAY

Size is not the whole animal.

Length and weight

Frilled shark is represented by about 2 m / 6.6 ft; Otodus obliquus by estimated to about 9.1 m / 30 ft. Deepwater records remain limited. Soft-body dimensions are inferred from teeth and living analogues.

Bite evidence

Frilled shark: 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

Its body plan looks ancient, but living frilled sharks are modern species—not unchanged fossils. It belonged to the megatooth lineage that later produced megalodon.

04

TRACE THE CLAIMS

Sources and limits.

Frilled sharkFlorida MuseumOtodus obliquusPaleobiology DatabaseHow we standardize comparisonsRead the methodology →