Newt
During the subsequent few months, the larvae undergo metamorphosis, during which they develop legs, and the gills are absorbed and replaced by air-breathing lungs. Some species, such as the North American newts, also become more brightly coloured during this phase. Once fully metamorphosised, they leave the water and live a terrestrial life, when they are known as "efts". Only when the eft reaches adulthood will the North American species return to live in water, rarely venturing back onto the land. Conversely, most European species live their adult lives on land and only visit water to breed.
Sex and sexuality in speculative fiction
"War with the Newts", a 1936 satirical science fiction novel by Czech author Karel Čapek, concerns the discovery in the Pacific of a sea-dwelling race, an intelligent breed of newts - who are initially enslaved and exploited by humans and later rebel and go war against them. The book includes a detailed appendix entitled 'The Sex Life of the Newts', which examines the Newts' sexuality and reproductive processes in a pastiche of academese. This is one of the first attempts to speculate on what form sex might have among non-human intelligent beings.