Salamanders range in size from the minute salamanders, with a total length of 27 mm (1+1⁄8 in), including the tail, to the Chinese giant salamander which reaches 1.8 m (6 ft) and weighs up to 65 kg (145 lb). All the largest species are found in the four families giant salamanders, sirens, Congo eels and Proteidae, which are all aquatic and obligate paedomorphs.

Some of the largest terrestrial salamanders, which go through full metamorphosis, belong to the family of Pacific giant…
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