Sea lamprey found in the northern and western Atlantic Ocean along the shores of Europe and North America, in the western Mediterranean Sea, the Black Sea, and in the shores of the Great Lakes. They have been found at depths to 4000 m and tolerate temperatures between 1.0 and 20 °C. The largest European populations of sea lampreys are located throughout the south-western areas of Europe (north-central Portugal, north-northwest of Spain, and west–south-west of France). These countries also support the main fisheries of the species. Sea lampreys are anadromous. From their lake or sea habitats, they migrate up rivers to spawn (followed
Turgai Sea separated Europe from Asia." The division of the Eurasian landmass by the Turgai Sea had the effect of isolating animal populations. Perhaps best known to laypeople were the horned dinosaurs called Ceratopsia of the Cretaceous Period, which were restricted to Asia and western North America (which were connected for much of this era). The existence of the Turgai Sea also restricted various freshwater fish and amphibians. The Turgai Sea derives its name from a region of modern-day Kazakhstan, with its Turgai River and Turgai Valley. Turgai Sea The Turgai (or Turgay) Sea or Turgai Strait, also known as the West