Slime molds can show altruistic behavior by sacrificing themselves to save others, despite not having a brain or central nervous system, and without feeling empathy for others. Dictostelium Discoideum is an example of a type of slime mold that exhibits this behavior.
Slime mold cells move along the ground by expanding and contracting the cytoplasm, while at the top of the stalk, many slime mold cells called slugs, move using little feet-like appendages.