Shabla Tuzla is a natural brackish lagoon with an open water area of 24.4 ha. The reservoir is separated from the sea by about 80 m wide sandy hair, and here are the highest dunes on the northern Bulgarian Black Sea coast. It is a salt lake, formed mainly by the infiltration of salty seawater under the sand dunes. Its average depth is 0.6 m, its average salinity is 0.004.
Shabla Tuzla is an extremely important site in terms of nature protection. The wetland is part of the Shabla Lake Complex, included in the list of BirdLife International – Ornithologically important places / OVM / in Europe and Corine site according to the European program CORINE Biotopes with code F00008700. Lake “Shabla Tuzla” together with the protected area “Shabla Lake”, the adjacent agricultural lands and marine waters is an object of the European ecological network NATURA 2000 under the names “Shabla Lake Complex” / under Directive 79/409 / EEC for the protection of wild birds / and Lake Shabla – Ezerets ”/ under Directive 92/43 / ЕЕС for protection of natural habitats and wild flora and fauna/.
The origin and ecological characteristics of Tuzla show that this small lake is a unique coastal ecosystem with extremely rich flora and fauna.