Yes but scientists have only recently managed to use implants to study navigation in fish [1], so we don’t know how to control them. Fish brains are significant

Yes but scientists have only recently managed to use implants to study navigation in fish [1], so we don’t know how to control them. Fish brains are significantly more complex than cockroaches so it might not be feasible. [1] https://www.sciencefocus.com/news/cyborg-fish-solves-brain-secrets https://www.sciencefocus.com/news/cyborg-fish-solves-brain-s...