This Predaceous Diving Beetle larva (Dytiscus spp.) has captured and is feeding on a dragonfly nymph (one of the skimmers - Family Libellulidae). Prey is captured with the large sickle-shaped mandibles which contain a hollow tube - much like a syringe. Digestive enzymes are injected into the prey and later, body fluids are sucked back up through the tubes. The beetle larva was feeding on the dragonfly about 4 hours. 2 gallon aquarium, 5D II, 100 mm macro, 1/200, f/16, ISO 100, MT24-EX macro twin flash (diffused), tripod, cable release. I cleaned up tiny bits of debris in the water and ran nr on the background. All comments are welcome and appreciated.