Let us decide to investigate the liquid water by means of Raman spectroscopy. This inorganic compound is made of simple molecules, so we could imagine a simple spectroscopic investigation too, but it is not so. Even a review of literature about the subject is rather challenging. So let us start from a question, posed by : "How much H2O is there in the ocean?". "The question is surprisingly hard to answer because a large fraction of the water [is made of] molecules are hydrogen bonded together forming molecular clusters. Rather little of the liquid water exists as the singlet H2O molecule. Water exists dominantly as a bimolecular fluid in which the hydrogen bonded clusters and nonhydrogen bonded forms are in a temperaturecontrolled dynamic equilibrium", according to Brewer and coworkers propose a brief review of literature, and report spectroscopic experiments "to test how well the knowledge of hydrogen bonding in pure water can be translated into the medium of sea water". Starting from the discussion provided by we consider the Raman region between 2800 and 3800 cm -1 , that is the O-H stretching Raman band. We will provide some further literature, and some decompositions of this Raman band, by means of q-Gaussian functions. In fact, Brewer and coworkers are giving decomposition -they call it "deconvolution" -in five Gaussian components. But other literature is giving different approaches, so we feel confident in the proposal of using q-Gaussian functions for the analysis of water Raman spectra too.