Glyceridae

Glyceridae is a family of polychaete worms. They are commonly referred to as beak-thrower worms or bloodworms. They are bright red, segmented, aquatic worms. The proboscis worm Glycera is sometimes called bloodworm. The Glyceridae are epi- and infaunal polychaetes that prey upon small invertebrates. They are errant burrowers that build galleries of interconnected tubes to aid in catching their prey.

Characteristics

 * Pointy snout used for burrowing in sediment
 * No septa in anterior part of bodies
 * Rely on peristalsis to move
 * Explosively evert pharynx into sediment, anchor position with prostomium and pull body forward.
 * Eversible pharynx also used in prey capture: 4 poisonous fangs