"S" is for this amphibian; most are only a few inches long, but giant Chinese ones can grown much larger
Most 
salamanders are small, and few species are more than 6 inches (15 ... Sirens 
have only two legs, but the other salamander species develop four ... (Frogs and 
toads are just the opposite: their hind legs grow more quickly .... Amphibia (
Amphibians).