Nematode worm (IMAGE) University of Tokyo Caption This green fluorescent protein (GFP) image of a nematode highlights different subsets of neurons in different colors. The real size of a nematode is only 0.6 millimeter to 1 millimeter long. Credit 2022 Hirofumi Kunitomo Usage Restrictions Credit must be given to the creator. License CC BY 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.