Mosasaurus was a marine lizard, not a dinosaur. The largest species is often shown at movie-monster scale, but conservative modern reconstructions sit closer to 11-13 m.
Length
about 13 m in the conservative display
Height
roughly 2.8 m through the body
Mass
about 10 tonnes
When
Late Cretaceous - about 82-66 million years ago
Life restoration of Mosasaurus swimming in a dark prehistoric sea
All bars share one linear metre scale. Human height and animal body length use different orientations, noted on each detail page.
Interactive true-scale view
Mosasaurus beside a 1.7 m human
The shared ground plane keeps 13 m and the human reference on one metre scale. Detailed models load progressively; labeled wireframes preserve scale where a model is pending.
Preparing the true-scale scene...
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Mosasaurus13 mDetailed 3D model
Human1.7 mDetailed 3D model
Full 3D exhibit Continue into the ranked gallery to inspect the model, camera angles and surrounding giants.
At 13 m, the displayed animal spans about 7.6 reference-human heights. Its skull alone could approach two metres, longer than a person is tall.
More than one number
Length, height and body mass
The 18 m Megalodon used by ScaleCheck is about five metres longer. Even so, a 13 m marine reptile would have dominated most animals in its Cretaceous sea.
Display length
13 m
Display height
2.8 m
Display mass
10 t
Evidence boundary
How certain is this size?
Skulls are more common than complete skeletons, so total length depends on the head-to-body ratio used. Published estimates range from roughly 11-12 m to older upper figures near 18 m.
Why compare it
The question this animal answers
Mosasaurus shows why popular culture and paleontology need separate scales. A conservative animal remains enormous without borrowing the blue whale proportions of a film version.
