More than Meets the Eye: sipunculan worm

Compare this 3D image of a very young larva to the black-and-white photomicrograph of the same species to your left. You can see the muscles in neon green, cell nuclei in blue, and the eyes, cilia (used in swimming), and digestive system in red.

Confocal laser scanning micrograph of a three-day-old larva of Nephasoma pellucidum