Unraveling (IMAGE) University of Wisconsin-Madison Caption As long as a free end gets stuck on something, and some force from moving water or struggling fish pulls in the opposite direction, tiny skeins of thread produced by hagfish can unspool fast enough to make an enormous amount of protective slime. Credit Image courtesy Jean-Luc Thiffeault 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.