Shore fly
5 mm long and with prominent rear breathing tubes, emerge from the eggs 2–3 days later. These maggots live in and just beneath the algal crust growing [...] , where they feed on algae, bacteria, yeasts and other microorganisms. In 3–6 days, they pass through three larval stages and then pupate inside the final [...] new adults emerge after 4–5 days. Adult shore flies typically live between 2–3 weeks after eclosion.