Astynax, a Blind Cave Fish (IMAGE) Technical University of Munich (TUM) Caption One biological model for Snookie the robot sub is the blind cave fish Astynax, which finds its way in the dark by relying on a sensory organ called the lateral-line system. Credit Institute for Theoretical Physics, TUM Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.