Megamouth shark following day. As of July 2017, the preserved and partially dissected head of a megamouth shark was on display at Osaka Aquarium in Osaka, Japan. On July 25, 2017, a megamouth shark was recorded on video at Gili Lawa Laut near Komodo island, Indonesia, as it swam slowly past divers Penny Bielich and Heikki Innanen. The shark appeared to have at least one remora attached. On February 11, 2018, a juvenile male measuring 4.34 meters in length was accidentally entangled in a fishing net off the coast of Negros Oriental in the Philippines. The body of the deceased shark was
Robot fish instead of forward swimming only. The shapes and sizes of fins vary drastically in living fish, but they all help to accomplish a high level of propulsion through the water. In order for robot fish to achieve the same type of rapid and maneuverable propulsion, robot fish need multiple control surfaces. The propulsive performance is related to the position, mobility, and hydrodynamic characteristics of the control surfaces. The key to controlling a multi-joint robotic fish is creating a simplified mechanism that is able to generate a reasonable amount of control. Designers should consider some important factors, including lateral body motions,