- Bay of Bengal
- Indian Ocean
- Palk Bay
- Mannar Gulf
- Pulicat Lake
- Vembanad Lake
- Ashtamudi Lake
- Kayamkulam Lake
- Periyar River
- Bharathapuzha River
- Pamba River
- Meenachil River
- Muvattupuzha River
- Chittar River
- Neyyar River
- Vaippar River
- Vaigai River
- Palar River
- Cheyyar River
- Thenpennai River
- Ponnaiyar River
- Kaveri River
- Manimuthar River
- Araniyar River
- Korttalayar River
- Pennar River
- Chitravathi River
- Vedavathi River
- Krishna River
- Tungabhadra River
- Bhima River
- Musi River
- Palar River (Andhra)