As part of a detailed study on the colonization of newly created and isolated pools by cladocerans, the community build-up of a pool near the Belgian coast was studied. Three large daphniid species managed to colonize this new habitat during the first year of its existence. The first colonizing species was Daphnia atkinsoni, a species very rare to the cladoceran fauna of Northwestern Europe and new to the Belgian fauna. Although the occurrence of Daphnia atkinsoni is striking, the colonization of the new habitat can be explained by short-range dispersal of resting eggs, as all three cladoceran species are present in waterbodies in the immediate proximity (0.5 km) of the new pool. It is hypothesized that the occurrence of Daphnia atkinsoni in the region is related to long-range dispersal of resting eggs associated with wintering geese, which are very abundant in the specific region.