A couple of pictures from organisms we don't usually see but are all around us.
These are green algae of a genus called pediastrum*. You can find them everywhere but are mainly found in locations such as ponds and lakes. They are a larger type of algae and form colonies of cells like displayed the picture. They are harmless but very pretty.
The outside of the cell called the celwall can have many different structures. This particular one has little bulbs all over, just barely visible without an electron microscope.
Isn't the world around us a fascinating place?
(*names often change in the algea world but I'll stick by what is generally accepted at this point).