In the south coast, there five theerthas were sages resided. (panchatheertha) One of them is Agastyatheertha. The others are Saubhadratheertha, Paulomatheertha, Karandamatheertha, and Athipavanatheertha. As per Mahabharata Adiparva Chapter 220, verse 3, these theerthas became infested with crocodiles, which led the sages to desert them.