SHARK VS SHARK

Greenland sharkvsWhitetip reef shark

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

LivingSomniosus microcephalus×LivingTriaenodon obesus
QUICK VERDICT

Greenland shark is about 3.0× longer by these reference values.

Greenland shark uses a 6.4 m upper reference, compared with 2.13 m for Whitetip reef shark. Greenland shark's weight reference is about 56× heavier.

01

ON THE SAME SCALE

Human. Bus. Whale.
Pick your reference.

RELATIVE LENGTH · 0–24 METERS
AGreenland sharkconfirmed to about 6.4 m / 21 ft
BWhitetip reef sharkreported to 2.13 m / 7 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.

MeasureGreenland sharkWhitetip reef shark
Length referenceconfirmed to about 6.4 m / 21 ftreported to 2.13 m / 7 ft
Weight referencereported to about 1,023 kg / 2,255 lbreported near 18.3 kg / 40 lb
Bite forceNo reliable published estimateUnknownNo dependable maximum foundUnknown
HabitatCold North Atlantic and Arctic watersTropical Indo-Pacific reefs
DietFish, carrion and marine mammalsOctopus, fishes and crustaceans
03

WHAT THE DATA CAN SAY

Size is not the whole animal.

Length and weight

Greenland shark is represented by confirmed to about 6.4 m / 21 ft; Whitetip reef shark by reported to 2.13 m / 7 ft. Age and upper mass involve uncertainty; length is better documented. The species is usually smaller than its reported maximum.

Bite evidence

Greenland shark: TuffShark found no defensible species-level bite-force estimate to display. Whitetip reef shark: No standardized maximum is used.

Living versus extinct

Both species are living, but record-sized individuals are rare. These upper references should not be read as normal adult size.

Ecology changes the matchup

The age estimate is extraordinary; a dependable bite-force figure is not available. Its slim body lets it hunt inside reef crevices.

04

TRACE THE CLAIMS

Sources and limits.

Greenland sharkNOAA Ocean ServiceWhitetip reef sharkFlorida MuseumHow we standardize comparisonsRead the methodology →