Abstract
This paper discusses the scientific studies on aqua bio-mechanisms and those application to ocean engineering from the viewpoints of drag reduction and propulsion mechanisms of surface and underwater vehicles and sensor technology. The study of aqua bio-mechanisms, aims not only to unveil the locomotion mechanisms of the aquatic animals analyzing the external flows and the autonomous systems having various behavior forms, but also to develop machines that are tender towards their environments with locomotion function and autonomous control system making reference to the aqua bio-mechanisms. The first part deals with the biomechanics on aquatic animals, especially on pectoral fin motion, and the behavior analysis such as neuronal network and sensory biology. The second part deals with drag reduction of vehicle with an undulating body, propulsion mechanisms of vehicles and biology-inspired sensors.