Underwater robots have made significant advancements over the past 70 years, but bio-inspired propulsion systems are still in their early stages. These systems require more interdisciplinary collaboration between biologists and roboticists. Octopuses are among the smartest marine animals, possessing remarkable abilities such as camouflage, exploration, and hunting. Additionally, they can swim using their tentacles, a feature that has intrigued researchers aiming to replicate these capabilities in robotic designs. However, the complexity of creating an eight-armed bio-mimetic swimming platform has been a significant challenge from the outset. In this research, we introduce a novel bio-inspired robotic swimming platform that combines asymmetric passive deformable arms with a fast-recovery umbrella-like mechanism. The design uses only two simple constant-speed motors to mimic the octopus's arm movements and stroke time ratio, achieving efficient swimming. During the second power stroke, the robot reached a top speed of 314 millimeters per second. This approach reduces the complexity of traditional octopus-inspired swimming robot drive systems while maintaining excellent swimming performance. By providing a more viable and efficient platform, our design facilitates deeper research into bio-mimetic robotics and marine biology. It opens new avenues for scientists and engineers to collaborate, potentially leading to advancements in both fields. The success of this project underscores the importance of interdisciplinary efforts in developing innovative and efficient underwater technologies.