SHARK VS SHARK

Frilled sharkvsHorn shark

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

LivingChlamydoselachus anguineus×LivingHeterodontus francisci
QUICK VERDICT

Frilled shark is about 1.64× longer by these reference values.

Frilled shark uses a 2 m upper reference, compared with 1.22 m for Horn shark. Frilled shark's weight reference is about 1.50× heavier.

01

ON THE SAME SCALE

Human. Bus. Whale.
Pick your reference.

RELATIVE LENGTH · 0–24 METERS
AFrilled sharkabout 2 m / 6.6 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.

MeasureFrilled sharkHorn shark
Length referenceabout 2 m / 6.6 ftreported to 1.22 m / 4 ft
Weight referencelarge-adult reference about 15 kg / 33 lblarge-adult reference about 10 kg / 22 lb
Bite forceNo dependable maximum foundUnknown128–338 N theoretical, depending on tooth positionModeled
HabitatDeep continental slopesRocky eastern Pacific reefs
DietSquid, fishes and small sharksUrchins, crabs and mollusks
03

WHAT THE DATA CAN SAY

Size is not the whole animal.

Length and weight

Frilled shark is represented by about 2 m / 6.6 ft; Horn shark by reported to 1.22 m / 4 ft. Deepwater records remain limited. Weight is a rounded adult reference.

Bite evidence

Frilled shark: No standardized maximum is available. 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

Its body plan looks ancient, but living frilled sharks are modern species—not unchanged fossils. Its rear teeth crush hard prey, and its bite mechanics have been tested directly and modeled.

04

TRACE THE CLAIMS

Sources and limits.

Frilled sharkFlorida MuseumHorn sharkHuber et al. (2005)How we standardize comparisonsRead the methodology →