An after-hours trip to Aarhus University Hospital Skejby's radiology department has shed light on a mysterious and ancient fish, one that remains one of the world's rarest—the Coelacanth. Researchers from the University of Copenhagen and Aarhus University have removed Denmark's only specimen of this primordial fish from its jar of alcohol and gained new insight into how it functions. The new knowledge could contribute to saving this critically endangered deep sea dweller.