This text provides the reader with tools necessary to study biological and bio-inspired flows, all the while developing an appreciation for their evolutionary and engineering constraints. It is suitable for students already exposed to introductory concepts in fluid mechanics and applied mechanics as a whole, but who would not need an advanced training in fluid mechanics per se. Currently no textbook exists that can take students from an introductory position in fluid mechanics to these contemporary topics of interest. The book is ideal for upper-level undergraduates and graduate students studying a range of engineering domains as well as biology, or even medicine.