A schlieren technique is used to visualize the fluid cavity resonances of an insonified fluid-filled (brass) cylindrical shell in the high-frequency overlapping resonance regime,kb>30,wherebis the inner radius of the shell. Hybridization of modes occurs at frequencies where resonances interfere and the resulting dissymetrization of the wave fields are evident in the experimental images. Similar behavior is seen in theoretical predictions obtained using the normal mode series solution for a shell excited by a plane wave. At very high frequencies(kb>100)the field in the cavity has characteristics that can be associated with a ray description of acoustic propagation; in these cases caustics are observed in the acoustic field.