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.
STS-65
At least two of the four adult newts died on the voyage. The first newt death was attributed simply to stress. The second dead newt was found by Donald A. Thomas late on Sunday 17 July 1994 while checking the tanks, however the second death was called "peculiar" in a comment by Dr. Michael Wiederhold, a scientist on the ground. At the time it was said it would be difficult to remove the newt from the tank because of weightlessness, but the dead animal could contaminate the tank if left inside. The newts were Japanese Red-bellied Newts ("Cynops pyrrhogaster").
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