Red Drum Illustration (image) University of Texas at Austin Caption The new research indicates that Red Drum may be "income" breeders, meaning that it's the diet they're eating just before and during the time they're spawning that is responsible for most of their eggs' nutrient content. Credit Illustration by Marianna Grenadier Usage Restrictions Credit illustrator. 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.