Illustration of a transparent 1.5 mL Eppendorf tube with light blue liquid and a small white enchytraeid worm inside.

schematic image of a transparent 1.5 mL Eppendorf tube standing upright, with clear light blue liquid filling the bottom third of the tube. Inside the liquid, a small, thin, white enchytraeid worm is visible, curled slightly. The tube is against a plain white background See more