Tethys or Tethis may refer to: *

Tethys (database) Tethys is an online knowledge management system that provides the marine renewable energy (MRE) and wind energy communities with access to information and scientific literature on the environmental effects of devices. Named after the Greek titanes ...

, an online knowledge management system about the environmental effects of offshore renewable energy * ''Tethys'' (gastropod), genus of gastropods in the family Tethydidae *

Tethys (moon) Tethys (), or Saturn III, is a mid-sized moon of Saturn about across. It was discovered by G. D. Cassini in 1684 and is named after the titan Tethys of Greek mythology. Tethys has a low density of 0.98 g/cm3, the lowest of all the majo ...

, a natural satellite of Saturn *

Tethys (mythology) In Greek mythology, Tethys (; grc, Τηθύς, Tēthýs) was a Titan daughter of Uranus and Gaia, a sister and wife of the Titan Oceanus, and the mother of the river gods and the Oceanids. Although Tethys had no active role in Greek mythology ...

, a Titaness in Greek mythology * ''Thetys'' (salp), a genus of gelatinous sea salp *

Tethys Ocean The Tethys Ocean ( el, Τηθύς ''Tēthús''), also called the Tethys Sea or the Neo-Tethys, was a prehistoric ocean that covered most of the Earth during much of the Mesozoic Era and early Cenozoic Era, located between the ancient continents ...

, a Mesozoic-era ocean between the continents of Gondwana and Laurasia *

Tethys Research Institute The Tethys Research Institute (official name: ''Istituto Tethys ONLUS'') is a non-profit research organisation founded in 1986 to support marine conservation through science and public awareness and by participating in the international conservatio ...

, a non-governmental scientific organisation based in Italy * "Tethys", a song from '' The Ocean of the Sky'' by The Used * Tethys, the Japanese name for "Thetis", a boss character in ''

Mega Man ZX Advent ''Mega Man ZX Advent'', known in Japan as , is an action-platform video game developed by Inti Creates and published by Capcom for the Nintendo DS handheld game console. The game was first released in Japan on July 12, 2007; in North America on ...

'' * Tethys River, an interplanetary waterway in Dan Simmons's ''

Hyperion Cantos The ''Hyperion Cantos'' is a series of science fiction novels by Dan Simmons. The title was originally used for the collection of the first pair of books in the series, '' Hyperion'' and '' The Fall of Hyperion'', and later came to refer to th ...

See also