Damian ordered C. elegans for his research project, but he has a feeling the order isn't correct. Upon arrival, he took a sample under the microscope but couldn't see any organisms with the 4X objective. When he increased the magnification, he could see some 10um single celled organisms that had a similar shape to C. elegans, but they seemed to be spiraling instead of undulating. He decided to do a Gram stain, and they were colored red. To which phylum does this organism likely belong, and why?