After finishing my undergraduate work, Dr. Fish offered me a position in his lab at West Chester University as a masters student studying propulsion in cetaceans. During one of the experiments on cetacean tail flukes, I observed that the dense internal material contained collagenous fibers oriented in a criss-crossing pattern that seemed to convey anisotropy (directionality). I expanded this observation into a multi-species comparison of the morphology and material properties of the cetacean tail fluke. The initial portion of this research has been written up for publication in the Journal of Morphology (Gough et al. 2018).