Fish Louse, SEM. Colored scanning electron micrograph of the underside of a fish louse (Argulus sp.) This freshwater crustacean is usually found on carp. The head (bottom right) has two reduced antennae above the eyes. Two suckers are modification of the maxillae. Below these are arm-like mouthparts. The louse attaches itself to a fish’s gill covering and feeds on mucus, scales and blood. Magnification: x10 when printed at 10 centimeters wide.
© Steve Gschmeissner / ScienceSource.com