samudra-sena-rajye tu
ganga-sagara-sangame
kirtayitva harim devi
campa-hattam jagama ha

“O Devi! The Lord performed harikirtana in the kingdom of Samudra Sena at the confluence of the Ganga and the ocean before proceeding to Campahatta.” (Navadvipa-dhama-mahatmya, Pramana-khanda 4.43) 

Srila Bhaktivinoda Thakura describes in Navadvipa-bhava-taranga: “After traveling some distance from there (the house of Vidya Vacaspati), I see Samudragarh which purifies whole world. Previously, at this place, during the battle of Bhimasena and Samudra Sena, Dinabandhu (the friend of the poor, Lord Sri Krishna) gave His darsana to His devotee Sri Samudra Sena. Here the ocean takes shelter of the River Ganga in order to witness the Navadvipa pastimes of Lord Gauranga in great joy and ecstasy. All the demigods and demons see Sri Gangasagara- tirtha eternally manifest in Navadvipa-dhama.”