SHARK VS SHARK

Common threshervsHorn shark

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

LivingAlopias vulpinus×LivingHeterodontus francisci
QUICK VERDICT

Common thresher is about 6.2× longer by these reference values.

Common thresher uses a 7.6 m upper reference, compared with 1.22 m for Horn shark. Common thresher's weight reference is about 34× heavier.

01

ON THE SAME SCALE

Human. Bus. Whale.
Pick your reference.

RELATIVE LENGTH · 0–24 METERS
ACommon thresherreported to 7.6 m / 24.9 ft
BHorn sharkreported to 1.22 m / 4 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.

MeasureCommon thresherHorn shark
Length referencereported to 7.6 m / 24.9 ftreported to 1.22 m / 4 ft
Weight referencerecorded over 340 kg / 750 lblarge-adult reference about 10 kg / 22 lb
Bite forceNo dependable maximum foundUnknown128–338 N theoretical, depending on tooth positionModeled
HabitatTemperate and tropical open watersRocky eastern Pacific reefs
DietSchooling fishes and squidUrchins, crabs and mollusks
03

WHAT THE DATA CAN SAY

Size is not the whole animal.

Length and weight

Common thresher is represented by reported to 7.6 m / 24.9 ft; Horn shark by reported to 1.22 m / 4 ft. Length comparisons can exaggerate body bulk because the tail is exceptionally long. Weight is a rounded adult reference.

Bite evidence

Common thresher: Its hunting performance cannot be reduced to jaw force. Horn shark: Experiments also measured bites; the displayed range is the study's theoretical maximum from front to rear teeth.

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

Much of its length is tail, which it uses to stun prey. Its rear teeth crush hard prey, and its bite mechanics have been tested directly and modeled.

04

TRACE THE CLAIMS

Sources and limits.

Common thresherFlorida MuseumHorn sharkHuber et al. (2005)How we standardize comparisonsRead the methodology →