Here is another robot inspired by nature. This Cephalopod-Inspired Robot changes it shape to achieve cyclic jet propulsion. This underwater robot can achieve max average trust of 0.19N and swimming speed of 18.4 cm/s. This robot has a soft body to change its internal volume and cross-sectional area.
As the above video shows, this robot has an on-board camera with a sensor, so it can be used to monitor the environment.
[Credit: Bioinspired Robotics and Design Lab. University of California, San Diego]