Common thresher is about 1.07× longer by these reference values.
These animals are effectively close in maximum-length terms, so measurement uncertainty can matter more than the apparent difference. Megamouth shark's weight reference is about 3.6× 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
Common thresher is represented by reported to 7.6 m / 24.9 ft; Megamouth shark by reported to about 7.1 m / 23 ft. Length comparisons can exaggerate body bulk because the tail is exceptionally long. Sparse specimens make a true maximum difficult to establish.
Bite evidence
Common thresher: Its hunting performance cannot be reduced to jaw force. 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
Much of its length is tail, which it uses to stun prey. Known from relatively few encounters, it still carries major uncertainty.
TRACE THE CLAIMS