SHARK VS SHARK

Frilled sharkvsPacific 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.

LivingChlamydoselachus anguineus×LivingSomniosus pacificus
QUICK VERDICT

Pacific sleeper shark is about 3.5× longer by these reference values.

Pacific sleeper shark uses a 7 m upper reference, compared with 2 m for Frilled shark. Pacific sleeper shark's weight reference is about 60× heavier.

01

ON THE SAME SCALE

Human. Bus. Whale.
Pick your reference.

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

MeasureFrilled sharkPacific sleeper shark
Length referenceabout 2 m / 6.6 ftreported near 7 m / 23 ft
Weight referencelarge-adult reference about 15 kg / 33 lblarge-animal estimate about 907 kg / 2,000 lb
Bite forceNo dependable maximum foundUnknownNo dependable maximum foundUnknown
HabitatDeep continental slopesCold North Pacific, often deep
DietSquid, fishes and small sharksFishes, squid, marine mammals and carrion
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; Pacific sleeper shark by reported near 7 m / 23 ft. Deepwater records remain limited. Large values often depend on indirect or incomplete records.

Bite evidence

Frilled shark: No standardized maximum is available. 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 body plan looks ancient, but living frilled sharks are modern species—not unchanged fossils. Rare encounters make its maximum size less certain than familiar coastal species.

04

TRACE THE CLAIMS

Sources and limits.

Frilled sharkFlorida MuseumPacific sleeper sharkAlaska Department of Fish and GameHow we standardize comparisonsRead the methodology →