SHARK VS SHARK

CretoxyrhinavsPacific 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.

ExtinctCretoxyrhina mantelli×LivingSomniosus pacificus
QUICK VERDICT

Cretoxyrhina is about 1.00× longer by these reference values.

These animals are effectively close in maximum-length terms, so measurement uncertainty can matter more than the apparent difference. 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
ACretoxyrhinaestimated to about 7 m / 23 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.

MeasureCretoxyrhinaPacific sleeper shark
Length referenceestimated to about 7 m / 23 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 107–73 million years agoCold North Pacific, often deep
DietLarge fishes and marine reptilesFishes, squid, marine mammals and carrion
03

WHAT THE DATA CAN SAY

Size is not the whole animal.

Length and weight

Cretoxyrhina is represented by estimated to about 7 m / 23 ft; Pacific sleeper shark by reported near 7 m / 23 ft. Length is reconstructed from fossils; mass is too model-dependent for a single figure here. Large values often depend on indirect or incomplete records.

Bite evidence

Cretoxyrhina: TuffShark does not scale a bite value without a published species-specific model. 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

Teeth and rare skeletal material point to a large, fast lamniform predator. Rare encounters make its maximum size less certain than familiar coastal species.

04

TRACE THE CLAIMS

Sources and limits.

CretoxyrhinaSmithsonian National Museum of Natural HistoryPacific sleeper sharkAlaska Department of Fish and GameHow we standardize comparisonsRead the methodology →