Pacific Bluefin Tuna (image) Stanford University Share Print E-Mail Caption Research on tunas in the lab of Stanford Professor Barbara Block identified the substance in crude oil that causes dysfunction in heart cells. This is a Pacific bluefin tuna in the Open Sea exhibit at the Monterey Bay Aquarium. Credit Monterey Bay Aquarium Usage Restrictions Image may only be used with appropriate caption or credit 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.