These guys moved so fast so the picture is cruddy. So I'm going to avoid a possible future argument and just leave it at genus.
Euglena sp observada en un objetivo de 40x.Lab. de Microbiología,F.C.B,UANL
Green protist with red is Euglena
The Euglenozoa are a large group of flagellate protozoa. They include a variety of common free-living species, as well as a few important parasites, some of which infect humans. There are two main subgroups, the euglenids and kinetoplastids. Euglenozoa are unicellular, mostly around 15-40 µm in size, although some euglenids get up to 500 µm long.