Scientists have documented a groundbreaking discovery of a protozoan species named Euplotes gigatrox, which can transform into a cannibalistic 'supergiant' that hunts and consumes its own species. This finding, published in the journal PNAS, reveals that these microbes can drastically change their size and behavior, showcasing complex actions previously attributed only to multicellular organisms. Found in a seawater filtration system in Curaçao, these microbes can grow over twice the length of normal cells and shift from filter-feeding on bacteria to predation, capturing their clonal relatives at a rate of one every ten minutes. The transformation involves a significant change in movement patterns, with supergiants exhibiting circular paths suited for hunting. Researchers sequenced the genome and proteins of the protozoan in different states, discovering that supergiants represent a distinct developmental phase with unique gene activity. This research not only expands the understanding of single-celled organisms but also provides a new model for exploring fundamental developmental questions.