The swimming motion of Tuna type fishes has excellent ability for its speed and efficiency. In the former studies, we made 1/1 scale model of Blue Fin Tuna body and caudal fin. The body resistance in the water flow are measured, and the lift and drag force of caudal fin are also measured. By using these data, this paper shows a design example of fish type robot which can swim maximum 2m/s speed.
