Chocolate Porcelain Crab (IMAGE) University of California - Davis Caption The chocolate porcelain crab is one southern, warm-water species that appears to have gained a foothold in Northern California since the 2014-2016 marine heatwave. Credit Jackie Sones/UC Davis Usage Restrictions Provide credit. 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.