damselfly nymph造句

• Damselfly nymphs swim by fish-like undulations, the gills functioning like a tail.
• Damselfly nymphs breathe through external gills on the abdomen, while dragonfly nymphs respire through an organ in their rectum.
• Whereas damselfly nymphs have three feathery external gills, dragonfly nymphs have internal gills, located around the fourth and fifth abdominal segments.
• Damselfly nymphs differ from dragonflies nymphs in that they possess caudal gills ( on the abdomen ) whereas dragonflies breathe through the rectum.
• Fishing flies that mimic damselfly nymphs are sometimes used in wet-fly fishing, where the hook and line are allowed to sink below the surface.
• The relatively small head is dominated by large eyes, and three pairs of long legs ( or appendages ), making it look like a damselfly nymph, although " W . backesi " has long antennae, unlike damselflies.
• The nymphs are voracious labium ( a toothed mouthpart on the lower jaw ) that forms the so-called mask; it is rapidly extended to seize and pierce the " Daphnia " ( water fleas ), mosquito larvae, and other small aquatic organisms on which damselfly nymphs feed.
• While most anglers catch trout fresh from either the Department of Fish and Game's Mojave River hatchery or the Whitewater Trout Farm, many fish elude their pursuers and grow fat on a diet of midge larvae, damselfly nymphs and small baitfish, which makes their meat a rich, pinkish color, like their brethren in Crowley.