Blood Gnats are large parasitic insects (most likely flies) who are heart-shaped and dwell in people's hair, where they lay their eggs. They are native to Blood Island. First seen in the episode "Love Bugs". They were last seen drifting away to Blood Island with Sally Syrup. So far, nothing else has been seen or heard about them. Blood
Gnats were also shown to be oddly edible, as many residents of Stormalong Harbor were devouring the Blood Gnats.