#aquatic insect
- Coenagrionid damselfly — A small, slender-bodied damselfly belonging to the family Coenagrionidae (formerly Agrionidae), structurally characterized by transparent membranous wings folded vertically over the abdomen at rest and often displaying brilliant metallic coloration. These insects are predators, inhabiting areas in close proximity to freshwater lentic or lotic aquatic systems.
- Water bug — A popular or regional name attributed to certain small aquatic insects or minuscule organisms that live or develop in stagnant waters, ponds, or abandoned wells. Sometimes, the term is used in a diminutive sense to describe a small, fast flow of running water.