Rheological properties of marine mud are incorporated into a seawave- seabed interaction model. The model assumes that the viscoelastic properties of the mud are dependent on the wave-induced strains inside the stratified bed, and it solves for the depth of fluidization in the bed as a function of the imposed wave height. Below the fluidized layer the mud is assumed to behave elastically with a slow depth stratification. In the fluidized layer the behavior is assumed to be viscoelastic with a complex kinematic viscosity coefficient which is also a function of the imposed wave height. ¿ American Geophysical Union 1993