Synonyms for Dobson (same or very similar meaning)
WordNet sense 1 (large brown aquatic larva of the dobsonfly; used as fishing bait):
hellgrammiateWordNet sense 2 (large soft-bodied insect having long slender mandibles in the male; aquatic larvae often used as bait):
dobsonfly, Corydalus cornutusFrom the ODE community, based on WordNetadd/edit