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In this work we consider the evolution of the interactive dark fluids in thebackground of homogeneous and isotropic FRW model of the universe. The darkfluids consist of a warm dark matter and a dark energy and both are describedas perfect fluid with barotropic equation of state. The dark species interactnon-gravitationally through an additional term in the energy conservationequations. An autonomous system is formed in the energy density spaces andfixed points are analyzed. A general expression for the deceleration parameterhas been obtained and it is possible to have more than one zero of thedeceleration parameter. Finally, vanishing of the deceleration parameter hasbeen examined with some examples.

Will there be again a transition from acceleration to deceleration in course of the dark energy evolution of the universe?