The Family Corydalidae is a group of large predatory insects known as dobsonflies or hellgrammites. They have a distinct appearance with elongated bodies, large wings, and powerful mandibles that they use to catch their prey. Other synonyms for this family include the dobsonfly family or the Corydalus family, which is a genus within this family that contains some of the largest and most impressive dobsonflies. These insects can be found in freshwater habitats all over the world, and although they may look intimidating, they do not pose a threat to humans. Instead, they play a crucial role in their ecosystem by helping to control populations of other insects.