The first endemic Baltic Sea fish species received its name
(PHYSorg.com Biology)

The Baltic flounder Platichthys solemdali is the first fish species shown to be native only to the Baltic Sea, i.e., the first endemic fish described from the area and one of the only two known endemic species when considering any organism. The fact that a new vertebrate species is found and described from European waters, and especially from the species-poor Baltic Sea still after more than a century of biological research in the area, makes this finding significant.