Living Coelacanth Found Off South Africa

Context

By the early twentieth century, coelacanths served as a standard illustration of an extinct vertebrate group. Swiss-American naturalist Louis Agassiz had described the first fossil specimens in 1836, and subsequent finds placed the youngest examples in the late Cretaceous roughly 66 million years ago. With no living representatives documented, scientists concluded the lineage had vanished well before the diversification of modern mammals and birds.

Coelacanths belong to the lobe-finned fishes, a clade that shares anatomical traits with the ancestors of four-limbed land vertebrates. Their presumed disappearance left a conspicuous gap in the record of vertebrate evolution. While South African trawlermen occasionally encountered unusual deep-water catches, these specimens received little scientific attention until the late 1930s.

What Happened

On the morning of 22 December 1938, Captain Hendrik Goosen of the trawler Nerine brought up his nets near the mouth of the Chalumna River east of East London. Among sharks, starfish, and sponges lay a five-foot fish with hard, iridescent blue scales, white flecks, and four fleshy, limb-like fins. Goosen, following instructions from the local museum, alerted curator Marjorie Courtenay-Latimer.

Courtenay-Latimer examined the specimen at the docks and recognized it as unlike any modern fish. With the museum closed for the holidays and no suitable refrigeration available, she enlisted a taxidermist to wrap the fish in formaldehyde-soaked newspaper and a bedsheet. She then mailed a detailed description and sketch to ichthyologist J.L.B. Smith at Rhodes University. Smith, on holiday, received the letter on 3 January 1939 and immediately suspected a coelacanth.

Smith reached East London on 16 February 1939. Upon seeing the preserved fish he confirmed its identity, later recalling the moment as overwhelming in its precision of match to ancient fossils. He formally described the species as Latimeria chalumnae, honoring both the curator and the river where it was caught.

Aftermath

The announcement in the journal Nature and widespread press coverage stunned the scientific community. Smith offered a reward for further specimens, yet none materialized until 1952, when a second fish was landed in the Comoro Islands. That specimen was transported to South Africa aboard a military aircraft for study.

Comoran fishermen had long recognized the species under the local name gombessa, revealing that traditional knowledge had preserved awareness of an animal unknown to Western science for decades.

Legacy

The discovery established the coelacanth as the archetype of a “living fossil” and a Lazarus taxon, proving that ancient lineages could persist in isolated deep-water habitats where fossilization rarely occurs. It catalyzed sustained research into the fish’s biology, locomotion, reproduction, and genetics, including a 2013 genome sequence that clarified its relationship to lungfishes and tetrapods.

Beyond its immediate scientific value, the episode highlighted the critical role of museum curators and local observers in expanding knowledge. Later conservation concerns arose as populations proved small and vulnerable to fishing, resulting in international protective measures for the species.