Exploring the Skagit River delta north of Seattle on the weekend. Found this beautiful spot where hayfields had just been cut. There is a drainage ditch on either side of the road (see image) that was full of hay clippings – looked like it had been there for several days.
Sampling the water revealed an amazing proliferation of life: at the least, one can count nematodes, rotifers, various types of ciliates, spirotrichs, dinoflagellates, and the many small green ovoid organisms (Euglena?):