Ocellated Wrasse Spawning (VIDEO) University of California - Santa Cruz This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Female ocellated wrasses prefer males that build nests and take care of the fertilized eggs as they develop. In this video, a male and female spawn in the nest. Other types of males do not provide parental care and compete to fertilize the eggs. Small "sneaker" males hang out around a nest and dart in to release large amounts of sperm when a female is spawning. The females, however, seem to have found a way to thwart the sneaker males by giving an advantage to the nesting male's sperm. A new study shows that ovarian fluid released with the eggs during spawning favors sperm from the nesting males, limiting fertilization by sneaker males. Credit Suzanne Alonzo Usage Restrictions For use only with news coverage of this research. 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.