Which of the following statements are correct? 1. The chief pearl fisheries of the world lie in the tropical waters, temperate seas and fresh water. 2. Pearls are obtained from oysters or mussels 3. India produces cultured pearls along the eastern coast of Tamil Nadu and Andhra Pradesh 4. Tuticorin is an important pearl fishing port on the eastern coast of India.

- Statement 1 is correct. Pearl fisheries, both natural and cultured, are found in tropical marine waters (e.g., Persian Gulf, Indian Ocean, Pacific), temperate seas, and freshwater environments (lakes and rivers with mussels). - Statement 2 is correct. Pearls are calcified concretions formed within the shells of certain molluscs, most commonly oysters (marine) and mussels (freshwater). - Statement 3 is correct. India has been involved in cultured pearl production. Pearl farming (both marine and freshwater) is carried out in various states, including Tamil Nadu and Andhra Pradesh along the eastern/southeast coast. - Statement 4 is correct. Tuticorin (Thoothukudi) in Tamil Nadu, located on the southeast coast of India, has a long history as a center for natural pearl fishing in the Gulf of Mannar and remains an important hub related to pearl culture and fisheries in the region. While natural fishing has declined, its historical significance and current related activities justify calling it an important pearl fishing port.