With more than 1.2 billion people, India is the second-most populous country in the world and seventh-largest country by area. The country has 29 states and seven union territories. It is a multi-lingual and multi-ethnic society and operates a multi-party parliamentary democracy system. India has a long and diverse coastline bordered by the Arabian Sea on the south-west, the Indian Ocean on the south and the Bay of Bengal on the south-east. The northern part of India shares borders with, from west to east, Pakistan, China, Nepal, Bhutan, Myanmar and Bangladesh. In the Indian Ocean, India is in the vicinity of Sri Lanka and the Maldives. Key exports are engineering goods, petroleum products, gems and jewellery, agriculture products and textiles, next to IT and business outsourcing services. The west coast of India has a relatively rocky shoreline, while the east is mainly estuarine, with deltas of rivers such as the Godavari river, Krishna river, and Kavery river. West coast cities like Mumbai, Kerala and Tuticorin, have a large fishing fleet, while generally smaller fishing fleets are located at the Bay of Bengal from Chennai, Vizagnapatnam and Kolkata. The transition zone between river environments and maritime environments on the east coast is an excellent location for both fresh and brackish water aquaculture.