Kelp fly larvae (IMAGE) University of Gothenburg Caption The larvae from the kelp fly can be grown on by-products from algae farms. The larvae are rich in protein and can work well as a sustainable ingredient in fish feed. Credit Niklas Warwas Usage Restrictions None License Original 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.