SHARK VS SHARK

Great hammerheadvsPacific 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.

LivingSphyrna mokarran×LivingSomniosus pacificus
QUICK VERDICT

Pacific sleeper shark is about 1.15× longer by these reference values.

Pacific sleeper shark uses a 7 m upper reference, compared with 6.1 m for Great hammerhead. Pacific sleeper shark's weight reference is about 2.0× heavier.

01

ON THE SAME SCALE

Human. Bus. Whale.
Pick your reference.

RELATIVE LENGTH · 0–24 METERS
AGreat hammerheadreported to 6.1 m / 20 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.

MeasureGreat hammerheadPacific sleeper shark
Length referencereported to 6.1 m / 20 ftreported near 7 m / 23 ft
Weight referencerecorded to about 450 kg / 991 lblarge-animal estimate about 907 kg / 2,000 lb
Bite forceNo dependable maximum foundUnknownNo dependable maximum foundUnknown
HabitatTropical coastal and offshore watersCold North Pacific, often deep
DietRays, fish and smaller sharksFishes, squid, marine mammals and carrion
03

WHAT THE DATA CAN SAY

Size is not the whole animal.

Length and weight

Great hammerhead is represented by reported to 6.1 m / 20 ft; Pacific sleeper shark by reported near 7 m / 23 ft. The comparison uses the largest reported length and a record mass. Large values often depend on indirect or incomplete records.

Bite evidence

Great hammerhead: Comparative biomechanics exist, but a simple verified maximum is not established here. Pacific sleeper shark: No standardized maximum is available.

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 wide head is a sensory platform, not just an unusual silhouette. Rare encounters make its maximum size less certain than familiar coastal species.

04

TRACE THE CLAIMS

Sources and limits.

Great hammerheadFlorida MuseumPacific sleeper sharkAlaska Department of Fish and GameHow we standardize comparisonsRead the methodology →