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For the insect commonly called a fishfly in Canada, see Mayfly.
Male fishfly (Chauliodinae ssp).
Scientific classification e
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Megaloptera
Family: Corydalidae
Subfamily: Chauliodinae

Fishflies are members of the subfamily Chauliodinae, belonging to the megalopteran family Corydalidae.[1] They are most easily distinguished from their closest relatives, dobsonflies, by the jaws (mandibles) and antennae. In contrast to the large jaws (especially in males) of dobsonflies, fishfly mandibles are not particularly noticeable or distinctive, and the males have feathery antennae similar to many large moths. Chauliodes pectinicornis, the "summer fishfly", is a well-known species in North America.

In contrast to mayflies, which are small and usually live for a day or less as adults, fishflies are quite large, with a wingspan of 2.5 to 3 inches (6 to 8 cm). They will eat aquatic plants as well as small animals including vertebrates like minnows and tadpoles, and may live up to seven days as adults. Their entire lifespan is several years, but most of this time is spent as larvae.


  1. ^ See references in Haaramo (2008)


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