<p>➀ Seoul National University of Science and Technology developed a bio-inspired gripper for underwater robots, mimicking starfish tube feet using a hydrogel-rigid stem structure; </p><p>➁ The gripper achieves strong underwater adhesion (up to 65kPa) via vacuum mechanics during detachment, with release mechanisms via mechanical angling or fluid pressure; </p><p>➂ Potential applications include micro-LED chip handling, biomedical devices, and surgical tools adhering to wet surfaces.</p>