The warriors of ancient India would blow conch shells to announce battle. This is famously represented in the beginning of the Mahabharata war at Kurukshetra. In Mahabharata, each warrior's conch shell had a specific name- Krishna's Paanchajanya, Arjuna's Devdutta , Bhima's Paundra , Yudhisthira's Anantavijaya , Nakula's Sughosa and Sahadeva's was known as Manipushpaka .
The conch ( shankha ) is also blown to invoke Shiva. The special relation between the conch ( shankha ) and Shiva is evident from the similarity between the word Shankha and the word Shankara, which is one of Shiva's many names. The word Shankara could have been derived from Shankha-kara which roughly means conch-blower (Shankha = conch, Kara = blower).
The conch shell is also sacred to the Buddhists. The right-coiling, white conch shell is one of the eight auspicious symbols of Tibetan and Nepali Buddhism. It is believed to represent the beautiful sound of the spread of Buddha dharma .