Biogeographical regionalization bears on a print of influence of all complex of natural processes. The analysis of this phenomenon is connected to the decision of tasks of the physical-geographical regionalization of the ocean - allocation of natural complexes of different taxonomical rank, united in the system of units of zonal, vertical and azonal differentiation. The biogeographical heterogeneity of the World ocean is offered to be treated from landscape-ecological position, basing on the statement, that the specificity of each natural area determine an originality of it's biota and biom.