Vistula Lagoon of the Ests". Over three hundred years later, in the first half of the 13th Century, the name of Vistula Lagoon occurs in deeds issued by Teutonic Order in Latin version as Mare Recens (1246 - "mare" - a pool or lake or sea and "recens" - fresh) in contrast to the contemporary name for the Baltic Sea - Mare Salsum (Salty Sea). Then in 1251 we find record about Mare Recens et Neriam (Frisches Haff and Frische Nehrung, now Vistula Spit) and finally in 1288 Recenti Mari Hab (Haff) which as one can see corresponds with later German "Frisches
Keta Lagoon The lagoon is important in conserving several species of mangroves, crabs, shrimps and raffia plants. This lagoon holds variety of fishes from the marine environment and from rivers. It is a spawning zone for fingerlings and habitat is conducive for native fishes. With seasonal inflow of sea water, marine fishes migrate to breed in the calmer waters of the lagoon, especially the safe haven provided by the mangrove swamp section. Some of the freshwater species encountered were Oreochromis niloticus, Tilapia zillii, Hemichromis Fasciatus and H. bimaculatus. The common marine species found in the lagoon were the mojarra (Gerres melanopterus), half