Predaceous Diving Beetles are also called water tigers. Predaceous diving beetles are easily confused with water scavenger beetles (Coleoptera: Hydrophilidae). The predaceous diving beetles are called Dytiscidae. In fact, there are over 500 in North America and over 5,000 worldwide. Predacious Diving Beetles (a type of water beetle) are encrusted in hard dirt are ready to be excavated and discovered by young paleontologists. Predaceous diving beetles (Dytiscidae) are a moderately speciose family within the most speciose order of insects (Coleoptera). As their name implies, these beetles are predatory. However, if there are too many diving beetles in a pond or lake, they reduce the number of fist that live there because they eat the baby fist (baby fish are called "fry"). There is a family of water beetles, Dytiscidae, known as Predaceous Diving Beetles. It is oval shaped and small. On average, it has the length of 1 inch or 25 mm. B oth adult diving beetles and the larvae (the "water tigers") can bite people, but their bites do not usually hurt people or make them sick. The predacious diving beetle is a seldom seen but very common aquatic insect. The meaning is able to dive. Dytiscidae – based on the Greek dytikos "able to dive" are the predaceous diving beetles, a family of water beetles. • Body hardened and convex on top and bottom (Water scavenger beetles are concave on bottom) • Often rest hanging into water with tip of abdomen at surface • 2 long antennae • Short finger-like mouth parts, not visible from above. Life Cycle: Adults and larvae are found in water. Predaceous Diving Beetles Seeking Prey. Life History: • Primarily found in shallow, weedy, still water • … The latter surface for air head first and have a ridge or keel on the underside that runs down the thorax and extends into a point. One of the members of a family of water beetles is explained on Facts about Diving Beetles. It is a voracious predator, hunting smaller invertebrates, tadpoles and even small fish. With the name predaceous, I decided they weren't to be handled. They eat a variety of aquatic prey like other insect larvae and naiads. Barb immediately identified them as predaceous diving beetles (PDB). Common name(s): Predacious Diving Beetle. We've nicknamed the bug you see above, the predacious diving beetle, "zippity." However, this group has historically received little scientific attention to its systematics or its ecology within the aquatic invertebrate community. This species has feathery legs that help it navigate through water. The larvae are large, fearsome-looking beasts, with big, biting jaws: they look a … The Great diving beetle is a very large diving beetle that can be found in ponds and slow-moving water. However; you can see variations of length among the species of diving beetles. Diving Beetle resin replica measures 2" long x 1.25" wide. 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