Water scorpion with mites

A photo I took of a water scorpion (Ranatra sp.) who seems to have a water mite infestation. Water scorpions look much better up close, when their facial features are apparent. This one was a cooperative photography subject, just hanging motionless near the surface of the aquarium at a suitably photogenic angle. A water scorpion remains motionless as a way to ambush unsuspecting prey, which it seizes with its raptorial arms and then liquefies with an injection of enzymes from its beak.