New Mutant Coral Symbiont Alga Able to Switch Symbiosis Off (image) Tohoku University Share Print E-Mail Caption Symbiosis experiments using a mutant algal strain isolated in this study. The addition of a nutrient can lead to symbiosis (modified from Ishii et al.) Credit Shinichiro Maruyama Usage Restrictions Credit: Shinichiro Maruyama 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.