Prehistoric Animal Museum

Meet today’s friendExtinct toothed whale

Livyatan

A broad head with large teeth in both jaws.

Livyatan had large teeth in both its upper and lower jaws. Turn it to the side and see if you can find both rows along the edge of its mouth.

Still model of Livyatan on a transparent background

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Stegosaurus

Pachycephalosaurus

Ichthyosaurs

Tyrannosaurus rex

Rhamphorhynchus

Triceratops

Apatosaurus

Plesiosaurs

Gigantoraptor

Tupandactylus

Woolly mammoth

Dilophosaurus

Spinosaurus

Lystrosaurus

Archaeopteryx

Carnotaurus

Anomalocaris

Tully monster

Hallucigenia

Parasaurolophus

Ankylosaurus

Styxosaurus

Xiphactinus

Preparing the Livyatan exhibit.

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Guide for grown-ups

When it lived: Miocene
Where fossils were found: Pisco Basin, Peru
Body length: 13.5 m (about 44 ft)
Diet: Meat-eater
What kind of animal?: Extinct toothed whale. Livyatan was a large extinct whale with a broad head and large teeth in both its upper and lower jaws.

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Narration transcript

Livyatan had large teeth in both its upper and lower jaws. Turn it to the side and see if you can find both rows along the edge of its mouth.

Research notes about Livyatan

Research summary

Fossils of Livyatan date to the Miocene and have been found in Pisco Basin, Peru.

Learning from fossils

Scientists estimate its body length from skull fossils and other clues. Its complete body shape is still uncertain.

Scientific sources

Discovery of a giant predatory sperm whaleAccessed 2026-10-22

Leon Made This compiled these research notes from public museum resources and scientific papers while preserving uncertainty in the reconstruction. Last reviewed 2026-10-22.

3D model and asset credits

Livyatan melvillei: “Livyatan melvillei” by majorgalah, CC BY 4.0; modified for the Prehistoric Animal Museum. Creative Commons Attribution 4.0 International

Open source and licensing

The code is licensed under AGPL-3.0. Original science writing and project artwork use CC BY-NC-SA 4.0 for non-commercial sharing. The brand policy prevents impersonation, and third-party assets keep their original licences.

View the GitHub project Read the full licensing notes

Official source

Made by Leon Made This

Prehistoric Animal Museum is made and maintained by Leon Made This. Use these addresses to verify the official project and its creator.

Official Prehistoric Animal Museumhttps://leon-made-this.work/museum/en/Leon's personal websitehttps://leon-made-this.work/

More information is available below.

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Leon Made This

About this museum

A little museum made by a developer dad for his daughter

I’m Leon, a developer and a dad. When my daughter was three, dinosaur chases on television frightened her, so I made a 3D prehistoric animal museum where she could look quietly and listen only when she wanted to.

The museum is free, with no sign-up, adverts or visitor tracking. Finding one interesting detail at a time is plenty.

Official source

Made by Leon Made This

Prehistoric Animal Museum is made and maintained by Leon Made This. Use these addresses to verify the official project and its creator.

Official Prehistoric Animal Museumhttps://leon-made-this.work/museum/en/Leon's personal websitehttps://leon-made-this.work/

View the source on GitHub Read the licence and asset notes