Aquatic microorganisms

So Turtlegirl is responsible for the rotating population of critters in our home.  A week or so ago, she got a couple of newts, who promptly laid some eggs, from a nearby pond .  Yesterday she asked to go back to the pond to collect some small aquatic animals to feed her newly hatched newts.  She collected some pond water and scooped up some muck from the bottom and brought it home.  Then this morning, she put some pond water on a slide and looked at it under the microscope (nothing fancy, we got it at Wal-Mart for about $160) and took a video of what she saw with her digital camera:

We're still trying to figure out just what it is - we're thinking it's some kind of freshwater microscopic crustacean, based on our preliminary research.

And this:

And:

Very cool, huh?  We were surprised she got such good results with the equipment we have!