Haplophrentis (IMAGE) University of Toronto Caption This illustration shows the hyolith <i>Haplophrentis</i> extending the tentacles of its feeding organ (lophophore) from between its shells. The paired spines, or 'helens', are rotated downwards to prop the animal up off the ocean floor. Credit Artist: Danielle Dufault. © Royal Ontario Museum 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.