The Postberg Flower Reserve is open during Flower Season and is home of some mammals, like Eland.
In the South African Context, the saltmarshes of Langebaan are unique in that no river feeds into the lagoon. These salt marshes constitute approximately 32% of the entire saltmarsh habitat in the country, the largest in South Africa. The lagoon is entirely marine with a relatively stable salinity and supports dense populations of molluscs and crustaceans as well as 71 species of different marine algae. The lagoon also serves as a nursery for the development of juvenile fish; the extensive intertidal areas of the lagoon support up to 55 000 water birds in summer, most of which are waders (23 species), including 15 regular Palaearctic migrants.
The five islands of Saldanha Bay to the north of the Lagoon provide a home for nearly a quarter of a million sea birds, many of which are endemic to the nearshore regions of South Africa and Namibia. Cape Gannets (Monis capensis) and Cape cormorants (Phalocrocorax capensis) are abundant and the largest known colony of Kelp Gulls (Larus doninicanus) in Southern Africa is found on Schaapen Island. WCNP mostly contains strandveld vegetation; with the expansion of the park it also included the Hopefield sand plain fynbos. Both these habitat units are given a 50% irreplaceability rating, however, sand plain fynbos is regarded to be of higher conservation value than strandveld, due to very little being formally conserved and it being more threatened by alien plant invasion.