🐋 Blue whale vs Mosasaurus 🐊
The blue whale is about 4 times as long as Mosasaurus.
| Row | 🐋 Blue whale | 🐊 Mosasaurus |
|---|---|---|
| Top speed We don't have a checked number for Mosasaurus yet. | 20 mph32 km/h1 | no checked number yet |
| Weight We don't have a checked number for Mosasaurus yet. | 165 tons150 tonnes1 | no checked number yet |
| Lives Nobody knows how long a dinosaur lived, so there is nothing to compare. | 80 to 90 years80 to 90 years1 | no checked number yet |
| Eats The blue whale eats tiny floating sea life; Mosasaurus eats meat. | krill, tiny shrimp-like animals, by the mouthful | fish, sharks, shelled sea animals called ammonites and other sea animals |
| Lives in One lived long ago, one lives today: they never met. | every ocean | the shallow seas that once covered parts of Europe and North America; its first skull was found near the Meuse River, by the city of Maastricht in the Netherlands |
Which one? Blue whale or Mosasaurus
🏁 Who would win the race?
Nobody can time a dinosaur, so there is no race. Their bones tell us how big they were, not how fast.
We only race. Real animals mostly avoid each other. A race is the only fair contest: who reaches the tree first, by top speed.
Compare two more
Getting the animals ready…
📤 Share this pair
The link carries only the two animals’ names: peabody.kids/animals/compare/blue-whale-vs-mosasaurus
Where these numbers come from
- NOAA Fisheries, checked 30 October 2026.
- National Park Service, Big Bend National Park, checked 30 October 2026.