There are two Island groups of India :
1. The Andaman and Nicobar Islands — They lie in the Bay of Bengal. They are about 550 in number and are of volcanic origin. Barren Island is the only volcanically active island. They are separated by a wide channel called the Ten Degree channel.
2. The Lakshadweep Islands — They lie in the Arabian Sea. They have been formed by the growth of corals and are fewer in number than the Andaman and Nicobar Islands. Many of them are uninhabited. These islands form the smallest union territory of India.
