Greenland shark is about 1.33× longer by these reference values.
Greenland shark uses a 6.4 m upper reference, compared with 4.8 m for Bluntnose sixgill. Greenland shark's weight reference is about 1.73× 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
Greenland shark is represented by confirmed to about 6.4 m / 21 ft; Bluntnose sixgill by reported to 4.8 m / 15.8 ft. Age and upper mass involve uncertainty; length is better documented. Deepwater sampling is difficult, so upper records are sparse.
Bite evidence
Greenland shark: TuffShark found no defensible species-level bite-force estimate to display. 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
The age estimate is extraordinary; a dependable bite-force figure is not available. Its six gill slits mark an ancient branch of shark diversity.
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