Killer Sperm Invades Female Worm's Body (image) University of Maryland Share Print E-Mail Caption This image depicts an instance of cross-species breeding gone awry. Fluorescence microscopy reveals sperm, in red, invading a female worm's body. Credit Gavin Woodruff Usage Restrictions None Share Print E-Mail 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.