Command of the sea Great Britain accepted the principle in 1805; Russia, in 1824; and the United States (tacitly) in 1894. Many treaties, including the Treaty of Versailles, have dealt with the open seas, and currently the United Nations Convention on the Law of the Sea formalizes this freedom. Historically, many powers attempted to extend command of the sea into peacetime, imposing taxes or other restrictions on shipping using areas of open sea. For example, Venice claimed the Adriatic, and exacted a heavy toll from vessels navigating its northern waters. Genoa and France each claimed portions of the western Mediterranean. Denmark and Sweden claimed
Sea urchins of the Gulf of California major habitat locations. The scientific names, biogeographic distributions, world distributions, and depth ranges found in the list above are from the Sea of Cortez Database. A study from 2005 adds the following species : "Lytechinus anamesus", "Toxopneustes roseus", "Cassidulus pacificus", "Mellita kanakoffi", "Encope wetmorei", "Brissus latecarinatus", "Metalia spatagus", "Brisaster townsendi", "Moira clotho". Sea urchins of the Gulf of California The sea urchins of the Gulf of California live between the coasts of the Baja California Peninsula to the west and mainland state of Sonora, Mexico to the east. The northern boundary is the lateral band of land with the remains