Flabelligera is a genus of polychaetes in the family Flabelligeridae. Species are common around the world, in both temperate and cold waters. Flabelligera species have long, club-like papillae, which are encased in a smooth mucus sheath. They also have a distinct cephalic cage (a fan-like arrangement of chaetae around the head), and hooked neurochaeatae (ventral chaetae) which they use to hold onto rocks.

Flabelligera species are preyed on by a number of fish. They are most often found in waters with a temperature between 6.3 and 12.9 °C.

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