Sallam Lab Unearths 500 Fossil Fish in Egypt, Revealing Seas 4 Million Years After Dinosaur Extinction
Updated
Updated · The Conversation · Jun 4
Sallam Lab Unearths 500 Fossil Fish in Egypt, Revealing Seas 4 Million Years After Dinosaur Extinction
3 articles · Updated · The Conversation · Jun 4
Summary
Nearly 500 fossil fish specimens from Egypt’s Qreiya 3 site show modern-looking marine groups were already established about 4 million years after the asteroid strike that ended the dinosaurs.
The collection includes early relatives of tunas, jacks, moonfishes, seahorses and pipefishes, indicating key predator-prey structures in modern ocean ecosystems re-emerged surprisingly quickly.
Years of excavation and lab work under harsh desert conditions—temperatures nearing 50C during a 2023 expedition—were needed to recover, prepare and identify the fossils through CT scans and anatomical comparisons.
The assemblage also lacks many Cretaceous marine fish lineages, strengthening evidence that those groups disappeared at or near the end-Cretaceous mass extinction.
Researchers say the upper Egypt site offers one of the clearest records yet of how ocean life rebuilt after one of Earth’s largest extinction events.
An asteroid reset the oceans. How did microscopic survivors rebuild a modern fish community in a geological blink of an eye?
How did the same apocalypse that erased sea monsters pave the way for the ancestors of modern tuna and seahorses?
Rebuilding the Oceans: Qreiya 3 Fossils Uncover Fast Recovery and Modern Fish Origins After the K-Pg Extinction
Overview
A groundbreaking discovery at Egypt’s Qreiya 3 site has revealed a remarkable collection of fossilized fish, unearthed by Hesham Sallam’s team. These fossils provide a rare glimpse into marine life just four million years after the K-Pg extinction event that wiped out the dinosaurs. The findings show that many fish groups crucial to today’s ocean biodiversity were already present soon after the extinction, offering new insights into how modern marine ecosystems began to recover and re-establish themselves. This discovery marks a major advance in understanding the resilience and rapid evolution of life following a global catastrophe.