The Bismarck Sea is a body of water located in the southwestern Pacific Ocean, north of Papua New Guinea. There are several other names by which this sea is referred to, including Morobe Sea, New Guinea Sea, and Admiralty Sea. The Morobe Sea is named after the Morobe province of Papua New Guinea, while the name Admiralty Sea came from the Admiralty Islands, a group of islands located to the north. The New Guinea Sea is named after the nearby island of New Guinea. All these names describe the same large sea, which is known for its rich marine biodiversity and is a popular destination for scuba divers.