thalasso-, thalass-, thalassi-, thalassio-, thalatto-, thalatt- +
(Greek: sea, ocean)
Traditionally, there are five oceans: the Atlantic, the Pacific, the Indian, the Arctic, and the Antarctic. The Antarctic Ocean, lacking any precise natural boundaries, is sometimes considered an extension of the Atlantic, the Pacific, and the Indian oceans.
The adjacent bodies of salt water and various subdivisions of the oceans are generally known as seas, but local usage may also sanction such terms as gulfs, bays, channels, and straits; designations that are sometimes used interchangeably.
Some people think that an ocean cruise can provide them with thalassotherapies when they use the therapeutic pools of water on board.
2. Maritime supremacy: Certain big and important countries thought that they would rule the world by ruling the seas and having mastery over the oceans.
Inter-related cross references, directly or indirectly, involving the "sea" and the "ocean" bodies of water: abysso- (bottomless); Atlantic; batho-, bathy- (depth); bentho- (deep, depth); halio-, halo- (salt or "the sea"); mare, mari- (sea); necto-, nekto- (swimming); oceano-; pelago- (sea, ocean); plankto- (drifting).