For historical use in Western Christianity, especially the Latin Church, see "flabellum". "Flabellum angulare" is a solitary coral and does not form colonies. The hind tibia and flabellum are similar to the tribe "Bombus". Flabellum angulare is a species of deep sea coral belonging to the family Flabellidae. Flabellum curvatum is a species of marine, cold water coral in the family Flabellidae. A flabellum is also a fan-shaped structure on the fifth legs of horseshoe crabs (Xiphosura).