The phenomenon of collective motion of Pt particles (primary particles and aggregates) immersed in water containing organic fuels has been observed. Over time, these Pt particles tend to aggregate into numerous schools at the bottom of the container. Subsequently, unique spatiotemporal patterns emerge, including repetitive fission/fusion dynamics and dispersing/clustering synchronization among schools. Notably, the species of organic fuels influence the observed patterns. Pt particles exhibit self-propulsion through catalytic oxidation of organic fuels by dissolved oxygen, mirroring the chemical mechanism seen in living organisms. This contrast with previous studies on chemically propelled objects underscores the biomimetic nature of the system, highlighting its resemblance to living processes. This self-propelled system, operating with an aerobic metabolic mechanism, presents a valuable real-world model for elucidating the fundamental principles underlying collective motion in living organisms.