Fossil Evidence Shows The Longest Crocodile To Live Was 40 Feet Long and Weighed 17,600 Pounds

By: Sam Watanuki | Published: Jul 18, 2024

Imagine a crocodile so large it dwarfed modern-day giants. The Sarcosuchus imperator ruled the Cretaceous period, approximately 112 million years ago.

This colossal reptile reached lengths of 40 feet and weighed around 17,600 pounds, earning the nickname “SuperCroc.”

Unveiling the Sarcosuchus Imperator

The discovery of Sarcosuchus imperator fossils in the Tenere Desert of Niger provided a glimpse into its massive size.

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Sarcosuchus in the National Museum of Natural History, Paris

Source: Shadowgate/Wikipedia

With a skull measuring 5 feet 6 inches and a unique bowl-shaped snout, this croc had about 100 teeth designed for hunting and a diet mainly of fish.

A Record-Breaking Predator

The Sarcosuchus imperator’s weight and length are truly staggering. Fossil evidence indicates it weighed around 17,600 pounds and measured about 41 feet long.

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Specimen of S. imperator prior to restoration

Source: LadyofHats/Wikipedia

Each year of its life, it gained a new armor plate, reaching its full size in approximately 55 years.

Purussaurus Mirandai: A Weighty Competitor

Living around 7.5 million years ago in Venezuela, Purussaurus mirandai was another giant, weighing about 5,700 pounds and stretching 32 feet 9 inches long.

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illustration of Purussaurus brasiliensis

Source: Nobu Tamura/Wikipedia

It had an unusual spine structure, which helped support its immense weight and lived in an environment rich in biodiversity.

The Mighty Euthecodon Brumpti

The Euthecodon brumpti thrived in Africa from the Early Miocene to the Early Pleistocene periods.

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A serene sunrise casting a warm golden glow over the African savannah, with silhouettes of acacia trees scattered across the landscape

Source: Magdalena Kula Manchee/Unsplash

Fossils found in Kenya’s Turkana Basin suggest it grew to 33 feet long and primarily fed on fish. This crocodile’s fossils are among the most commonly found in the region.

Gryposuchus Croizati: The Urumaco Giant

The Gryposuchus croizati lived in Venezuela’s Urumaco Formation during the Middle to Late Miocene period.

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Fossils of skull, a partial mandible and a isolated tooth of the gharial Gryposuchus colombianus.

Source: Rextron/Wikipedia

This crocodile, which may have reached lengths of 33 feet, weighed about 3,850 pounds. Geological changes that created ravine systems likely led to its extinction.

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Rhamphosuchus: The Beak Crocodile

The Rhamphosuchus, with its distinctive beak-like snout, lived during the Miocene period in present-day Pakistan.

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My reconstruction of the giant Pliocene gharial, Rhamphosuchus crassidens, with a Ganges river dolphin for size comparison.

Source: Apokryltaros/Wikipedia

Estimated to grow up to 36 feet long and weigh 6,000 pounds, it primarily consumed fish but also hunted other animals near waterholes.

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Mourasuchus: The Duck-Faced Crocodile

Mourasuchus lived around six million years ago in Venezuela and Brazil. This unique crocodile, which grew up to 39 feet 4 inches long, had a duck-like face and weak teeth.

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Mourasuchus pattersoni - skull

Source: Wikipedia

It likely scooped water to swallow prey whole, and its unique diet helped it reach weights of up to 16,000 pounds.

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Purussaurus Brasilensis: The Amazonian Titan

Weighing about 18,500 pounds and measuring as long as a tour bus, Purussaurus brasilensis lived in South America during the Late Miocene.

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illustration of Purussaurus brasiliensis

Source: Naturewasmetal/Reddit

It could exert 15,500 pounds of force with each bite and consumed up to 88 pounds of food daily, thriving around the Amazon River region.

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Modern Giants: Lolong and Cassius

Modern crocodiles like Lolong, who measured 20 feet 3 inches and weighed 2,370 pounds, and Cassius, the 17-foot-3-inch saltwater crocodile, show that while today’s crocs are large, their prehistoric counterparts were true giants of the animal kingdom.

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Cassius the crocodile

Source: Marineland Melanesia Crocodile Habitat

Modern conservation efforts help protect these amazing creatures and ensure their continued survival for generations to come.

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How Scientists Estimate Sizes

Scientists estimate the sizes of these prehistoric giants using fossil evidence and modern analogs.

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A female scientist is pictured working on an equation at her desk

Source: Freepik

By measuring the length of crocodile skulls from the tip of the snout to the back, they can approximate body lengths, providing fascinating insights into the past.

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The Legacy of Prehistoric Crocodiles

These prehistoric crocodiles highlight the incredible diversity and adaptability of ancient reptiles.

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Imprint of a dinosaur skeleton

Source: Depositphotos

From the Sarcosuchus imperator to the Mourasuchus, each species offers a unique glimpse into a world where giants once roamed the earth, showcasing nature’s remarkable evolutionary journey.

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