Borders of the oceans seas it contains) as follows: Note that these definitions exclude any marginal waterbodies that are separately defined by the IHO (such as the Kara Sea and East Siberian Sea), though these are usually considered to be part of the Arctic Ocean. The CIA defines the limits of the Arctic Ocean differently, as depicted in the map comparing its definition to the IHO's definition. The Atlantic Ocean separates the Americas from Europe and Africa. It may be further subdivided by the equator into northern and southern portions. The 3rd edition, currently in force, of the International Hydrographic Organization's (IHO) "Limits of
A Naturalist in Indian Seas A Naturalist in Indian Seas A Naturalist in Indian Seas, or, Four Years with the Royal Indian Marine Survey Ship Investigator is a 1902 publication by Alfred William Alcock, a British naturalist and carcinologist. The book is mostly a narrative describing the "Investigator"<nowiki>'</nowiki>s journey through areas of the Indian Ocean, such as the Laccadive Sea, the Bay of Bengal and the Andaman Sea. It also details the history of the "Investigator", as well as the marine biology of the Indian Ocean. The book is considered a classic in natural history travel, and in 1903, "The Geographical Journal" described it as