Vistula Lagoon Vistula Lagoon The Vistula Lagoon (; or "Kaliningradskiy Zaliv"; ; ) is a brackish water lagoon on the Baltic Sea roughly 56 miles (90 km) long, 6 to 15 miles (10 to 19 km) wide, and up to 17 feet (5 m) deep, separated from Gdańsk Bay by the Vistula Spit. It is now known as the Vistula Bay or Vistula Gulf. The modern German name, "Frisches Haff", is derived from an earlier form, "Friesisches Haff". The lagoon is a mouth of a few branches of the Vistula River, notably the Nogat, and the Pregolya River. It is connected to
Muthupet Lagoon in eastern side of Muthupet lagoon is comparatively lower than other areas. Tamil Nadu forest department has excavated several canals across the mudflat. Each main canal which enhances the water movement between sea and lagoon, has several sub canals on either side with a substantial number of mangrove seedlings. The western side is not straight a protruding land pocket has formed an islet like structure. This part of the lagoon lies near to Koraiyar river mouth with small mangrove patches. Muthupet Lagoon Muthupet Lagoon is located at the southern end of the Cauvery river delta on the Bay of Bengal,