Also from the Don Edwards San Francisco Bay National Wildlife Reserve, Weep site, this Euglena-like Protist is seen at 1000x magnification with Hoffman Modulation Contrast optics. See "Euglena" in Wikipedia and "Hidden Ecologies" using Google.
These Euglena-like Protista were found in 82-ppt saline water at the Weep site, Don Edwards San Francisco Bay National Wildlife Reserve. They carry out photosynthesis, but are grouped with Protista such as Paramecium and Amoeba. Search "Euglena" on Wikipedia to discover more.