オオサンショウウオは頭索動物？
The Japanese giant salamander ("Andrias japonicus") is endemic to Japan, where it is known as , literally meaning "giant pepper fish". With a length of up to almost 1.5 m (5 ft), it is the second-largest salamander in the world, only being surpassed by the very similar and closely related Chinese giant salamander ("A. davidianus"). There are only three known members of the Cryptobranchidae family: the Japanese and Chinese giant salamanders and the Eastern hellbender.
no