Oceanus ( /oʊˈsiːənəs/; Ancient Greek: Ὠκεανός (Ōkeanós); pronounced [ɔːkeanós]) was a pseudo-geographical feature in classical antiquity, believed by the ancient Greeks and Romans to be the World Ocean, an enormous river encircling the world.

Strictly speaking, Oceanus was the ocean-stream at the Equator in which floated the habitable hemisphere (οἰκουμένη, oikoumene). In Greek mythology, this world-ocean was personified as a Titan, a son of Uranus and Gaia. In Hellenistic and Roman mosaics, this Titan was often depicted as having the upper body of a muscular man with a long beard and horns (often represented as the claws of a crab) and the lower body of a serpent (cf. Typhon). On a fragmentary archaic vessel of circa 580 BC (British Museum 1971.11-1.1), among the gods arriving at the wedding of Peleus and the sea-nymph Thetis, is a fish-tailed Oceanus, with a fish in one hand and a serpent in the other, gifts of bounty and prophecy. In Roman mosaics, such as that from Bardo (illustration below) he might carry a steering-oar and cradle a ship.

David Arkenstone is an American New Age musician. His music is primarily instrumental, with occasional vocalizations. He was born in Chicago, Illinois on July 1, 1952. He has three children—Quillon, Dashiell and Valinor—with his first wife, Julie. His second wife was Diane Arkenstone, also a musician.

After moving from Chicago to California at the age of ten, he was involved in various high school bands playing guitars and keyboards, playing baseball in his spare time. He studied music in college and started a progressive rock band named after himself, but he soon discovered the music of Kitaro and was heavily influenced by it. Arkenstone was influenced by writers such as J. R. R. Tolkien and Ian Fleming, and grew up listening to bands like Emerson, Lake & Palmer, Deep Purple and Yes, as well as listening to classical music.

Arkenstone went solo and found his own sound in New Age music. Arkenstone says that has been greatly aided by technology: "Technology has produced some wonderful tools for making music. The computer allows me to fully orchestrate my pieces and really fine tune them." His music is primarily instrumental. His albums, often fantasy themed, often come packaged with literature and art. He worked with fantasy novel writer Mercedes Lackey on a few of his albums. Arkenstone and his ex-wife, Diane, created their own record label called Neo Pacifica. In addition to releasing their own music on the label, they have included other bands such as Earth Trybe, Enaid, and the Marquis Ensemble.