Basking shark is about 1.69× longer by these reference values.
Basking shark uses a 12 m upper reference, compared with 7.1 m for Megamouth shark. Basking shark's weight reference is about 4.9× 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
Basking shark is represented by reported to 12 m / 40 ft; Megamouth shark by reported to about 7.1 m / 23 ft. The upper length is exceptional; the mass is a rounded comparison estimate. Sparse specimens make a true maximum difficult to establish.
Bite evidence
Basking shark: A comparable maximum-bite study is not available for this filter feeder. Megamouth shark: This filter feeder lacks a comparable maximum-bite study.
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 enormous mouth strains plankton; it is not built for a giant predatory bite. Known from relatively few encounters, it still carries major uncertainty.
TRACE THE CLAIMS