Genetic Markers (IMAGE) Virginia Institute of Marine Science Caption This graph shows a frequency distribution of alleles for 348 genotyped blue marlin samples from the Pacific and Atlantic oceans. The bimodal distribution allows researchers and federal seafood agents to confidently determine a sample’s ocean of origin. Credit Graph courtesy of Laurie Sorenson/VIMS. Usage Restrictions One-time use only 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.