A student at the University of Surrey proposed a fish-like robot called Gillbert in the context of a university robotics contest, suggesting a system that could move through water and capture microplastics using a gill-inspired filter. The concept was subsequently developed into a 3D-printed research prototype by a university team. The robot mimics fish locomotion via a flexible tail and is designed to collect particles of up to around 2 mm, primarily for monitoring and experimental purposes rather than large-scale cleanup. The project was published as open source. The idea follows earlier conceptual work such as the CLEANINGFISH design study by Prof. Dr. Oliver Bendel (2014), which envisioned small robotic fish operating individually or in swarms to remove plastic and debris from aquatic environments and transport it to collection points, including objects located on the ground. This concept was further examined in 2015 within a project at the University of Applied Sciences and Arts Northwestern Switzerland (FHNW), where increasing plastic pollution in seemingly clean waters and its ecological and human impact were analyzed. Oliver Bendel and his student concluded that robotic fish could interfere with aquatic life and were not sufficiently efficient for practical large-scale deployment, while also raising questions in machine and technology ethics. Gillbert can be understood as a contemporary experimental continuation of these earlier ideas under improved technological and collaborative conditions.

Fig.: A modern take on the CLEANINGFISH design study