Piti Bomb Holes off Guam's coast. (IMAGE) U.S. National Science Foundation Caption Researchers at the University of Guam sample sponges at a place called Piti Bomb Holes off Guam's coast. Credit Jason Biggs 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.