Abstract: Light transmission in natural waters is a complex radiative transfer process and leads to a set of inverse problems, in order to estimate the different properties involved in this process. Our study in this field started with the identification of bioluminecence source profiles and was extended to the estimation of absortion and scattering coefficients [1-3]. Recently, reconstructions of the phase function and boundary conditions were also carried out for similar hydrological optics problems [4, 5]. A description of the recent results are presented. All estimations were done using noise-corrupted synthetic data, corresponding to "in situ" experimental data. Additionally, some algorithms for performing inversions from remote sensing data are outlined.