They have mouth brushes to filter the water and collect algae in their mouth to eat. As the larva grows, it will eventually shed its skin and larger skin forms on it. As the larva approaches its moult, it begins developing the body of a pupa. Different features occur while changing to a pupa. The head and thorax rest on the surface of the water as the body of an adult begins to form, when the mosquito is in its pupal stage.
Males usually hatch out of their pupa form before females.
The usual position to hatch out of the pupa is parallel to the surface. The Anopheles mosquito likes tropical or subtropical areas best for breeding. They prefer lakes or swamps for laying their eggs. This is why malaria is more common in Africa than it is here in the United States. Malaria originally started in central Africa and spread to Rome where populations were destroyed in the cities.