Here's everything you need to know before you visit. A Giant Salamander is a large amphibian in the Cryptobranchidae family. They prefer habitats with running water rather than stagnant areas. You can help us by donating to the Smithsonian’s National Zoo and Conservation Biology Institute’s Emergency Fund today. [6] Little has changed in the morphology of the Cryptobranchidae since the time of these fossils, leaving researchers to note "extant cryptobranchid salamanders can be regarded as living fossils whose structures have remained little changed for over 160 million years. These long-lived amphibians lurk in Japan's rocky, fast-flowing streams. The males guard the eggs until they hatch, but do not continue to protect the larval young. During this season, they migrate upriver looking for "dens" — caverns or burrows, each containing a single underwater entrance. The Japanese giant salamander (Andrias japonicus) is a species of salamander in the family Cryptobranchidae. This species does not exhibit sexual dimorphism (distinct differences in appearance between males and females), except during the breeding season when males develop a swollen cloaca. Japanese giant salamanders are native to Japan and can be found in the country's central highland mountainous regions. [10] At this point, the larvae live off their noticeable stored fat until ready to hunt. However, these salamanders are still sometimes hunted for their meat, which is considered a delicacy in parts of Japan. It takes approximately 3 months for the eggs to hatch. These continue to be difficult times, so we must fall back on your passion for our critical mission now more than ever. Males and females have overlapping home ranges and are more or less sedentary and solitary except during the breeding season. The largest, most dominant male in a territory of river will occupy the den and defend it. The Chinese giant salamander is the world’s largest amphibian, growing up to 1.8 metres long, with a large tail comprising almost 60% of the body length.It has even been reported in 1983 that a 3-metre, 70 kg salamander was purchased at a local market in China!There are only three living species of giant salamander in the family Cryptobranchidae: the Chinese giant salamander, the Japanese giant salamander, and the American hellbender. By understanding their habitat needs, metabolic functions and morphology, the Smithsonian hopes to be the first North American institution to breed Japanese giant salamanders, and to contribute to the growing body of knowledge on salamander disease. They can reach a length of 1.8 m (5.9 ft), though most are considerably smaller today.
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