bay of bengal is a sea or ocean
Bay of Bengal The Bay of Bengal (Bengali: বঙ্গোপসাগর [bɔŋgopoʃagoɾ]) is the northeastern part of the Indian Ocean, bounded on the west and north by India and Bangladesh, and on the east by Myanmar and the Andaman and Nicobar Islands (India). Its southern limit is a line between Sri Lanka and the northwesternmost point of Sumatra (Indonesia). It is the largest water region called a bay in the world. There are Countries dependent on the Bay of Bengal in South Asia and Southeast Asia.
South China Sea The South China Sea is a marginal sea that is part of the Pacific Ocean, encompassing an area from the Karimata and Malacca Straits to the Strait of Taiwan of around 3,500,000 square kilometres (1,400,000 sq mi). The sea carries tremendous strategic importance; one-third of the world's shipping passes through it carrying over $3 trillion in trade each year,[3] it contains lucrative fisheries that are crucial for the food security of millions in Southeast Asia, and huge oil and gas reserves are believed to lie beneath its seabed.[4]