I dropped 40 rosy reds in tank with my two plat spotted gars and the 4 baby arapaima (I will be moving them all into a 7.5k pond and later on an even bigger pond), I watched the arapaima clearly eat but the gars I couldnt see them hunt so I turned off the lights and came back 3 hours later and saw dead rosies with what seemed to be cracked/bleeding skulls could the arapaima have done that or the gars? Are they hunting for sport? Im so confused.