No dirt at all

At first, it looked like a speck of dirt on the glass sponge. But wait it was moving! Not dirt at all, but a beautiful leafy hairy shrimp. I moved my diopter in front of the lens and realized this tiny shrimp was berried, carrying a remarkable amount of eggs. I tried to stay perfectly still, even holding my breath to capture a shot as it perched on the delicate blue sponge.