Toxic Sea Slugs (VIDEO) Princeton University This video is under embargo. Please login to access this video. Caption Researchers have found that a sea slug that acquires defensive chemicals from eating algae has a surprising twist. The toxic chemicals, kahalalides, are actually made by bacteria that live inside the algae. The slug, algae and bacteria form a three-way symbiotic relationship. Credit Mohamed Donia, Princeton University Usage Restrictions Editorial 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.