This zone comprises two clearly different ecosystems: the coast and sea beds.
Coastline: These are areas of extreme conditions, on a steep gradient or open cliff, and exposed to the inclement nature the sea and wind. Few plant species grow on them. San Juan de Gaztelugatxe, Aketxe Island, Matxitxako Cape (Bermeo), the great cliffs of Ogoño Cape, the Antzoras coastline and the Cliffs of Lapatza are just some outstanding spots.
Sea bed: Beyond the coast, the marine environment is an ecosystem full of life and much more difficult to see than that of dry land, with a wealth of flora and fauna that is hard to find in other seas. The temperature of the water fluctuates between 10 ºC and 12ºC in winter, reaching 20ºC in summer. The most usual marine species in the waters that bathe the coastline of Busturialdea are molluscs, such as periwinkles, limpets, oysters, octopus and cuttlefish, crustaceans, such as crangon crangon, goose barnacles, lobster and crab or karramarro and fish, such as bass, mojarra, mackerel, Atlantic horse mackerel and red mullet. You can occasionally see large cetaceans in these waters, such as common dolphins or bottlenose dolphins, the fin whale, common minke whale, sperm whale and killer whale
Urdaibai Biosphere Route