Baltic Sea as species in 2005 and 2018 respectively, having formerly been confused with more widespread relatives. The tiny Copenhagen cockle ("Parvicardium hauniense"), a rare mussel, is sometimes considered endemic, but has now been recorded in the Mediterranean. However, some consider non-Baltic records to be misidentifications of juvenile lagoon cockles ("Cerastoderma glaucum"). Several widespread marine species have distinctive subpopulations in the Baltic Sea adapted to the low salinity, such as the Baltic Sea forms of the Atlantic herring and lumpsucker, which are smaller than the widespread forms in the North Atlantic. A peculiar feature of the fauna is that it contains a
Wildlife of the Falkland Islands sea. Introduced brown trout, have been established in many freshwater streams and have also formed sea-runs resulting in an increase in body size. Due to the introduction of brown trout and other fish species the endemic zebra trout (a galaxiid fish unrelated to typical salmonid trout) is now restricted to small streams in remote parts of West Falkland and Lafonia. Different species of krill are found in Falkland waters, with lobster krill inhabiting the warmer waters in the north. Vegetation on the archipelago is composed of grasses, ferns, and shrubs. Around 363 species of vascular plants have been recorded on