How was the coelacanth rediscovered after being presumed extinct?

The answer

The coelacanth was believed to have gone extinct 66 million years ago alongside the dinosaurs, known only from fossils, until museum curator Marjorie Courtenay-Latimer spotted a living specimen in a South African fisherman's catch in December 1938. The discovery of Latimeria chalumnae was hailed as the zoological find of the century. A second species, Latimeria menadoensis, was found in Indonesian waters in 1998. Coelacanths can live to over 100 years, grow to 2 meters long, and possess lobed fins that move in an alternating pattern similar to four-legged land animals, offering clues about how vertebrates transitioned from sea to land.