SHARK VS SHARK

Otodus obliquusvsPacific sleeper shark

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

ExtinctOtodus obliquus×LivingSomniosus pacificus
QUICK VERDICT

Otodus obliquus is about 1.30× longer by these reference values.

Otodus obliquus uses a 9.1 m upper reference, compared with 7 m for Pacific sleeper 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
AOtodus obliquusestimated to about 9.1 m / 30 ft
BPacific sleeper sharkreported near 7 m / 23 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.

MeasureOtodus obliquusPacific sleeper shark
Length referenceestimated to about 9.1 m / 30 ftreported near 7 m / 23 ft
Weight referenceNot reliably reconstructedlarge-animal estimate about 907 kg / 2,000 lb
Bite forceNo defensible estimate usedUnknownNo dependable maximum foundUnknown
Timeabout 56–45 million years agoCold North Pacific, often deep
DietLarge fishes and marine vertebratesFishes, squid, marine mammals and carrion
03

WHAT THE DATA CAN SAY

Size is not the whole animal.

Length and weight

Otodus obliquus is represented by estimated to about 9.1 m / 30 ft; Pacific sleeper shark by reported near 7 m / 23 ft. Soft-body dimensions are inferred from teeth and living analogues. Large values often depend on indirect or incomplete records.

Bite evidence

Otodus obliquus: No species-specific model is used. Pacific sleeper shark: No standardized maximum is available.

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

It belonged to the megatooth lineage that later produced megalodon. Rare encounters make its maximum size less certain than familiar coastal species.

04

TRACE THE CLAIMS

Sources and limits.

Otodus obliquusPaleobiology DatabasePacific sleeper sharkAlaska Department of Fish and GameHow we standardize comparisonsRead the methodology →