> In this talk we consider a class of degenerate parabolic systems that encompasses two different effects: porous medium and chemotaxis. > Such classes of equations arise in the mesoscale level modelling of biomass spreading mechanisms via chemotaxis. We address the well- posedness, the uniform boundedness in time and space and the long time dynamics under certain ?balance? condition on the order of the porous medium degeneracy and the growth of the chemotactic function."