Several species of mite in the hive . The mite that beekeepers refer to as the Pollen mite, Carpoglyphus lactis was, if I remember correctly, originally discovered on prunes feeding on the yeast on the surface of the fruit (and so called the prune mite). This microscopic pink mite doesn't feed off the pollen but eats the fungal mycelium of Bettsia alvei (the fungus associated with mouldy pollen). It is a harmless astigmatid mite getting rid of a fungus that turns cells of pollen into rock hard pellets that bees have difficulty moving so this mite is rendering the cells usuable again ie it is on our side so why kill it!.