What is oceanography

Please see the definition for it on the following link.

define:Oceanography - Google Search

Oceanography (from Ocean + Greek graphy = write), also called oceanology or marine science, is the branch of Earth Sciences that studies the Earth's oceans and seas. It covers a wide range of topics, including marine organisms and ecosystem dynamics; ocean currents, waves, and geophysical fluid dynamics; plate tectonics and the geology of the sea floor; and fluxes of various chemical substances and physical properties within the ocean and across its boundaries.

Simply, it is a branch of science dealing with physical and biological aspects of the oceans.