The prehistoric fish that shocked the world by refusing to stay extinct

Nature · Published 3 October 2026 Swipe more like this →

In short: In 1938, a trawler pulled a mysterious, steel-blue fish from South African waters. Thought to have vanished 70 million years ago, the coelacanth was a living fossil that captivated the globe. Once hailed as the missing link between sea and land, this creature hides secrets far stranger than its survival.

When Marjorie Courtenay-Latimer, curator of the East London Museum, first encountered the specimen in December 1938, she knew it was extraordinary. Measuring 1.5 metres with fleshy, limb-like fins, the fish defied existing biological records. Expert JLB Smith later confirmed it was a true coelacanth, a group previously known only from fossils dating back 409 to 66 million years. The discovery was so sensational it was compared to finding a dinosaur in one's garden, and it even inspired the monster in the 1954 film Creature from the Black Lagoon.

For years, the coelacanth was mistakenly viewed as the evolutionary bridge between aquatic life and land-dwelling tetrapods. However, modern science has corrected this. While they are lobe-finned fishes—more closely related to tetrapods than to common ray-finned fish—genetic sequencing in 2013 revealed that lungfishes are actually our closest living relatives. The coelacanth’s anatomy is uniquely adapted for deep-sea life, featuring a notochord rather than a spine and an intracranial joint that allows it to open its mouth exceptionally wide to hunt.

These elusive animals, known locally as gombessa, inhabit deep volcanic slopes, often sheltering in caves by day and hunting at night. They are ovoviviparous, with eggs hatching inside the female’s body after a gestation period exceeding 12 months. Their survival as a 'Lazarus taxon' is likely due to their limited geographic range and deep-water habitats where fossils rarely form. Today, the West Indian Ocean coelacanth remains a critically endangered species, a rare survivor from an ancient lineage that continues to challenge our understanding of vertebrate evolution.

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