Salamander - Japanese giant salamander

Japanese: サンショウウオ(山椒魚) - サンショウウオ

A general term for amphibians in the Caudata order, which are classified as Caudata, Ambystomatidae, and Plethodontidae. They have long bodies and well-developed tails that remain throughout their lives even after metamorphosis. The largest are 20 cm long, while the smallest are about 10 cm long. Their body color is generally dark green-brown. They usually have four limbs of roughly equal size, with four fingers on the front limbs and five on the back limbs. They breathe through their lungs and moist skin, but some species that live in rapid currents, such as the Japanese giant salamander, lack lungs. They are extremely docile and nocturnal, hiding under damp fallen logs or stones during the day. They prey on small animals such as earthworms and insects, as well as fish eggs. They gather in the water during the spawning season, and fertilize externally. The larvae have external gills and a lateral line system, which disappear after metamorphosis, but some species, such as the axolotl, are known to mature as larvae. There are 15 species known in Japan, including the Japanese giant salamander (endangered (Ministry of the Environment's 4th Red List)) and the black salamander (near threatened (Ministry of the Environment's 4th Red List)), which are not found in the Ryukyu Islands. → Japanese giant salamander

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

サンショウウオ目（有尾目）のうちサンショウウオ科，アンビストマ科，プレソドン科に含まれる両生類の総称。体は長く，よく発達した尾は，変態後も消失することなく一生残る。体長は大きいもので20cm，小さいもので10cmぐらい。体色は一般に暗緑褐色のものが多い。普通，ほぼ同大の四肢があり，前肢に４本，後肢に５本の指をそなえる。呼吸は肺と湿った皮膚とで行うが，ハコネサンショウウオのように急流性の種では肺を欠くものがある。性質はきわめておとなしく，夜行性で昼間は湿った倒木や石の下などに潜んでいる。ミミズや昆虫などの小動物や魚の卵などを捕食。産卵期には水中に集まり，体外受精を行う。幼生には外鰓と側線系があり，変態後消失するが，アホロートルのように幼生成熟をするものも知られる。日本にはカスミサンショウウオ（絶滅危惧II類（環境省第４次レッドリスト）），クロサンショウウオ（準絶滅危惧（環境省第４次レッドリスト））など15種が知られ，琉球列島には分布しない。→オオサンショウウオ

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