Bluntnose sixgill is about 1.08× longer by these reference values.
These animals are effectively close in maximum-length terms, so measurement uncertainty can matter more than the apparent difference. Bluntnose sixgill's weight reference is about 1.04× 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
Shortfin mako is represented by reported to about 4.45 m / 14.6 ft; Bluntnose sixgill by reported to 4.8 m / 15.8 ft. Record length and mass do not necessarily describe the same individual. Deepwater sampling is difficult, so upper records are sparse.
Bite evidence
Shortfin mako: No directly comparable maximum bite-force estimate is used. 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
Speed is its signature; the biggest animals are unusual and hard to verify. Its six gill slits mark an ancient branch of shark diversity.
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