Elasmobranchs (sharks, skates and rays) have a remarkable suite of sensory systems and have become formidable predators on a wide variety of prey species. Batoids face particular challenges in locating and ingesting prey because their dorso-ventrally flattened bodies prevent the use of vision in the final stages of prey capture. The goal of this project is to address how anatomical, functional morphological, sensory physiological and biomechanical features of stingrays contribute to their success by defining relationships between the structure and function of two highly modified and complex sensory systems. Specifically: How do interspecific anatomical differences in lateral line canal and electrosensory systems contribute to variation in detection capabilities with respect to feeding ecology? Detailed sensory system maps of three stingray species were constructed using high-resolution images. Significant interspecific differences were quantified. Ventral lateral line canals correlate with feeding ecology and differ primarily in the proportion of canal types and the degree of branching complexity. The benthic round stingray, Urobatis halleri, has a low proportion of pored canals, while the pelagic stingray, Pteroplatytrygon violacea, has an intermediate proportion of pored canals with almost no secondary branching. In contrast, the benthopelagic bat ray, Myliobatis californica, has extensive and highly branched pored ventral lateral line canals. Electrosensory morphology correlates with feeding habitat and prey mobility; benthic feeders U. halleri and M. californica, have greater electrosensory pore numbers and densities than P. violacea. Behavioral experiments were conducted to test functional predictions based on anatomical differences. Weak water jet and dipole electrode signals mimicking those produced by potential prey were presented in an experimental tank. Responses of individual rays were filmed and analyzed. As predicted from lateral line anatomy, the highest positive response rate to hydrodynamic stimuli was measured in M. californica. The electrosensory experiments revealed differences between species in response intensity and orientation pathway; however, all rays showed a similar behavioral detection threshold. Overall findings of this project support strong links between feeding ecology, sensory anatomy and detection capabilities in lateral line canal and electrosensory systems.