Cellular vesicles

What you're seeing

1. Translucent spheres, each holding a dense green clustered core, drift through a pale green-white space scattered with fine particles.
2. The largest sphere moves from left of frame towards the centre, its surface catching soft highlights.
3. Smaller spheres pass in and out at the edges and across the top of frame, some sharp and some soft in the shallow focus.
4. By the end the large sphere sits centred and in focus, with a second sphere upper left and two more to the right.