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
Geography of Asia to Scythia. The relatively recent study of plate tectonics has discovered that Asia has several regions that would be considered distinct landmasses if strictly geologic and tectonic criteria were used (for example, South Asia and East Asia). Definition of "continental plates" is the realm of geologists. Strictly in terms of geological landmasses or tectonic plates, Europe is a western peninsula of Eurasia and of the Africa-Eurasia landmass. In the latter, Europe and Asia are parts of the Eurasian plate, which excludes the Arabian and Indian tectonic plates. In human geography, there are several schools of thought. The more common school