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. They came to Stormalong through a seashell until brought back to their island with Sally Syrup. They are oddly edible, as many of Stormalong Harbor residents were devouring them. They are from the show Flapjack.
In FusionFall, they are wearable head item. They were also an objective in Valentine missions. There were three of them in The Suburbs: Peach Creek Commons, Sector V, and Genius Grove. After the Valentine event they were removed from the game.