Fly on Trap (IMAGE) Cell Press Caption The red dots are glands. When the trap closes, forming a green stomach, these glands release a lytic enzyme cocktail, digest the victim, and incorporate the nutrients release from the building blocks of the meat. Credit Sönke Scherzer Usage Restrictions Credit Required. 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.