Tanintharyi or Taninthayi is a small town in Tanintharyi Township, Myeik District, in the Tanintharyi Region of south-western Myanmar. It is the administrative seat for the township. The town is located on the Great Tenasserim River which eventually enters the sea at Myeik. The town is located at the confluence of this river and a tributary known as the "Li…Tanintharyi or Taninthayi is a small town in Tanintharyi Township, Myeik District, in the Tanintharyi Region of south-western Myanmar. It is the administrative seat for the township. The town is located on the Great Tenasserim River which eventually enters the sea at Myeik. The town is located at the confluence of this river and a tributary known as the "Little Tenasserim River" which runs south.