Megalodon is about 2.0× longer by these reference values.
Megalodon uses a 15.3 m upper reference, compared with 7.6 m for Common thresher. Megalodon's weight reference is about 141× 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 SETS THEM APART
More than a size contest.
Length and weight
Common thresher is represented by reported to 7.6 m / 24.9 ft; Megalodon by evidence-based upper estimate 14.1–15.3 m / 46–50 ft. Length comparisons can exaggerate body bulk because the tail is exceptionally long. No complete skeleton exists; 15.3 m is an evidence-based maximum from museum specimens, not a tape measurement.
Habitat and diet
Common thresher: Temperate and tropical open waters; schooling fishes and squid. Megalodon: Warm and temperate seas worldwide; large marine mammals, turtles and fishes.
Bite evidence
Common thresher: Its hunting performance cannot be reduced to jaw force. Megalodon: Finite-element scaling produced a range, not a directly measured bite.
Fossils change the certainty
At least one animal is known from fossils. Fossil length, weight and bite estimates depend on which living analogues and scaling equations researchers choose.
TRACE THE CLAIMS