Brundlefly is a fictional creature from the 1986 science fiction horror film, The Fly, directed by David Cronenberg. The character is a result of a failed teleportation experiment conducted by scientist Seth Brundle, who accidentally merges his DNA with that of a fly. This transformation leads to a gradual physical and mental decline, showcasing the consequences of unchecked scientific ambition. As Brundlefly evolves, he experiences disturbing changes, including increased strength and altered appearance, which reflect his struggle between human and insect traits. The film explores themes of identity, isolation, and the dangers of technology, making Brundlefly a memorable figure in horror cinema.