Squalicorax is about 1.04× longer by these reference values.
These animals are effectively close in maximum-length terms, so measurement uncertainty can matter more than the apparent difference. A clean mass ratio is not shown because at least one weight is not reliably reconstructed.
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
Bluntnose sixgill is represented by reported to 4.8 m / 15.8 ft; Squalicorax by estimated to about 5 m / 16 ft. Deepwater sampling is difficult, so upper records are sparse. Body length and ecology are reconstructed from incomplete fossil evidence.
Bite evidence
Bluntnose sixgill: No standardized maximum is available. Squalicorax: Bite traces show feeding, not maximum force.
Living versus extinct
At least one animal is known from fossils. Fossil length, weight and bite estimates depend on which living analogues and scaling equations researchers choose.
Ecology changes the matchup
Its six gill slits mark an ancient branch of shark diversity. Serrated teeth and bite traces show a broad, opportunistic diet.
TRACE THE CLAIMS