Aquatic insects are a group of arthropods that can live
in freshwater and brackish water successfully with spending at least one stage
of their life cycle in water. Actually more than 30,000 species of aquaticinsect have been identified which live in freshwater and only several hundredare living in marine environments. Vast majority of insect spend their primary
stage in water while adults are terrestrial, for instance orders of
Ephemeroptera (Mayfly), Odonata (Dragonfly and Damselfly), Plecoptera
(Stonefly), Trichoptera (Caddiesfly), Megaloptera (Alderfly), Neuroptera
(Lacewings), Diptera (Flies), Lepidoptera (Moths) and Hymenoptera (Wasps).
There are some species of Coleoptera (Beetle) and Hemiptera (Bug) mentioned asfully aquatic that larval, nymphal and adults stage exist in water. Semi
aquatic insect are related to semi aquatic and aquatic vegetation, the habitat
of water margin and water surface.
Some of aquatic insects play an important role in
transmitting diseases such as Malaria, Yellow fever, Dengue, Filariasis and
some other Arboviral diseases. Some of them like dragonfly and damselfly can be
the host of termatodes. A few of them have physical and mental annoyance anddermal damage on human and animal host by painful bite. Some aquatic insects
play a vital role as water recourse contamination indicators (e.g.
Ephemeroptera, Plecoptera and Trichoptera (EPT))
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