Harbor seals, among other true seal species, have uniquely undulated whiskers that allow them to track their prey using hydrodynamic trail following. The effects of the complex topography in reducing drag and vortex-induced-vibration (VIV) have been previously observed and documented. However, a more thorough analysis of the effects of deviations from nominal topography values offers an opportunity to assess a range of applicability, flow mechanisms, and a potential for interspecies comparison as well as a basis for bioinspired engineering design. This investigation employs dye visualization to examine the flow over a 3D-printed seal whisker and three additional models with the same nominal parameters as the seal whisker but with a range of undulation wavelength values. Experiments are performed in the Naval Undersea Warfare Center water flume at two different biologically relevant Reynolds numbers. Computer vision techniques are used to analyze the frequency content from vortex shedding and the downstream wake width, as a function of wavelength. Compared to the other wavelengths, a marked shift in frequency content is extracted from analysis of the seal whisker model, which is correlated with the shedding of vortical structures. The frequency, size, and shape of the vortical structures also decrease the width of the downstream wake. The experiments are supported by direct numerical simulations (DNS) of the same geometries, which enable a time-resolved and three-dimensional flow-field of vortex shedding.