H. Y. wrote the paper with inputs from any other authors. G. H. Y. splendens displayed against the fish duplicate. In fact, competitive behaviours are supported only if merits of territoriality exceed costs66, therefore, physical combats are commonly reserved to rare events in nature, so that it will reduce the lack of energy, time and to bypass the danger of injuries42, 57, 58. Physical acts occurred when the fish replica introduced at the least two stimuli concurrently e. g. , biomimetic shape in conjunction with LEDs on and never when the fish reproduction was static like a standard dummy Figs 4 and 5. Interestingly, although the cylindrical dummy was in a position to switch on LEDs, twist and twist together with LEDs on, as the fish duplicate did, no actual competitive shows were directed to it.