A Tailless Bacteriophage (image) University of Arizona Caption This is a tailless bacteriophage. Sullivan's research group recently published a paper (see extra info) showing that about 80 percent of viruses found in the sea are non-tailed, while most research in this field has focused on tailed viruses. "It shows just how far we still have to go in understanding these systems," Sullivan said. Credit Natalie Solonenko Usage Restrictions This visual may only be used in conjunction with reporting/posting of this news release. Image/video credit must be included exactly as indicated. 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.