Quantification of aquatic habitat is an essential aspect of understanding the response of fish populations to a large spectrum of human perturbation. However, traditional on-the-ground methodologies have suffered from being site- and time-specific, and thus not readily conducive to extrapolation. A proliferation of newly evolving techniques is now allowing for the evaluation of fish habitat at a variety of spatial and temporal levels. In this symposium we explore some recent developments in remote sensing and spatial modeling that will allow us to view fish habitat at a variety of scales. These methods will assist greatly in our ability to manage fish populations in the face of inter-related fisheries pressures, habitat fragmentation and degradation, and climate change.