SHARK VS SHARK

Blacktip reef sharkvsCretoxyrhina

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

LivingCarcharhinus melanopterus×ExtinctCretoxyrhina mantelli
QUICK VERDICT

Cretoxyrhina is about 3.9× longer by these reference values.

Cretoxyrhina uses a 7 m upper reference, compared with 1.8 m for Blacktip reef 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
ABlacktip reef sharkrecorded to 1.8 m / 5.9 ft
BCretoxyrhinaestimated to about 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.

MeasureBlacktip reef sharkCretoxyrhina
Length referencerecorded to 1.8 m / 5.9 ftestimated to about 7 m / 23 ft
Weight referencelarge-adult reference about 24 kg / 53 lbNot reliably reconstructed
Bite forceNo dependable maximum foundUnknownNo defensible estimate usedUnknown
TimeShallow Indo-Pacific reefsabout 107–73 million years ago
DietFishes, cephalopods and crustaceansLarge fishes and marine reptiles
03

WHAT THE DATA CAN SAY

Size is not the whole animal.

Length and weight

Blacktip reef shark is represented by recorded to 1.8 m / 5.9 ft; Cretoxyrhina by estimated to about 7 m / 23 ft. Most individuals are under 1.6 m. Length is reconstructed from fossils; mass is too model-dependent for a single figure here.

Bite evidence

Blacktip reef shark: No standardized maximum is used. Cretoxyrhina: TuffShark does not scale a bite value without a published species-specific model.

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 is far smaller than the offshore giants people often picture. Teeth and rare skeletal material point to a large, fast lamniform predator.

04

TRACE THE CLAIMS

Sources and limits.

Blacktip reef sharkFlorida MuseumCretoxyrhinaSmithsonian National Museum of Natural HistoryHow we standardize comparisonsRead the methodology →