Pacific sleeper shark is about 1.46× longer by these reference values.
Pacific sleeper shark uses a 7 m upper reference, compared with 4.8 m for Bluntnose sixgill. Pacific sleeper shark's weight reference is about 1.54× heavier.
ON THE SAME SCALE
Human. Bus. Whale.
Pick your reference.
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.
THE NUMBERS
Side by side.
WHAT THE DATA CAN SAY
Size is not the whole animal.
Length and weight
Pacific sleeper shark is represented by reported near 7 m / 23 ft; Bluntnose sixgill by reported to 4.8 m / 15.8 ft. Large values often depend on indirect or incomplete records. Deepwater sampling is difficult, so upper records are sparse.
Bite evidence
Pacific sleeper shark: No standardized maximum is available. Bluntnose sixgill: 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
Rare encounters make its maximum size less certain than familiar coastal species. Its six gill slits mark an ancient branch of shark diversity.
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