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Peru researchers unveil 10-million-year-old dolphin-like fossil found in desert

Remains discovered in Ocucaje Desert that was once part of Pacific Ocean
Published 18 Sep, 2025 09:44am
People stand near the fossilised skeleton of a small marine mammal estimated to be between eight and 12 million years old, in Lima, Peru. – Reuters
People stand near the fossilised skeleton of a small marine mammal estimated to be between eight and 12 million years old, in Lima, Peru. – Reuters

Paleontologists in Peru unveiled on Wednesday the fossilised skeleton of an ancient, dolphin-like creature estimated to be between 8 and 12 million years old.

The remains were discovered in July in Peru’s Ocucaje Desert, an area south of the capital Lima that was once part of the Pacific Ocean.

The fossilised skeleton of an ancient, dolphin-like creature estimated to be between 8 and 12 million years old, is displayed in Lima, Peru. – Reuters
The fossilised skeleton of an ancient, dolphin-like creature estimated to be between 8 and 12 million years old, is displayed in Lima, Peru. – Reuters

Paleontologist Mario Urbina, who was part of the discovery, referred to the ancient site as a “great hotel,” explaining that coastal mountains created a barrier from strong currents, making it an ideal, calm place for marine animals to reproduce.

The region was a sea for approximately 45 million years.

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Researchers from Peru’s state Geological, Mining and Metallurgical Institute (INGEMET) noted that the discovery helps them understand the geography of the past and how the coastline has changed over millennia.

The fossilised skeleton of an ancient, dolphin-like creature estimated to be between 8 and 12 million years old, is displayed in Lima, Peru. – Reuters
The fossilised skeleton of an ancient, dolphin-like creature estimated to be between 8 and 12 million years old, is displayed in Lima, Peru. – Reuters

Peru’s deserts are considered a rich cemetery for ancient marine species, with a 9-million-year-old fossil of a great white shark relative found earlier this year.

The fossilised skeleton of an ancient, dolphin-like creature estimated to be between 8 and 12 million years old, is displayed in Lima, Peru. – Reuters
The fossilised skeleton of an ancient, dolphin-like creature estimated to be between 8 and 12 million years old, is displayed in Lima, Peru. – Reuters

Prehistoric remains have also been found elsewhere in Peru in regions away from the coast. In April 2024, experts presented the fossilised skull of the largest known river dolphin, which inhabited what is now the Amazon about 16 million years ago.

pacific ocean

Peru

Ocucaje Desert

fossilised skeleton

Lima

Paleontologists

Mario Urbina

INGEMET

Prehistoric remains

fossil