The Summer Fishfly, Chauliodes pectinicornis, is an insect that grows to approximately 1 1/2 inches. It is omnivorous and spends most of its life in still or slow-moving water with lots of detritus. Th fishfly undergoes a complete metamorphosis in a log or under bark and emerges as the adult you see here. It will mate, lay eggs near the water, and die within seven days. 