Goniadidae is a family of marine worms within the Polychaeta. Goniadids have long, slender bodies and can grow up to 260mm in length, although most are less than 50mm long. Goniadids have an eversible proboscis with a circlet of chitinous jaws around the terminal end. Goniadids are highly mobile, burrowing predators which inhabit soft sediments, including sand and mud. Goniadids tolerate a sediment mud content up to 60%, with an optimum range of 50-55%. They are usually distributed within the

intertidal The intertidal zone or foreshore is the area above water level at low tide and underwater at high tide; in other words, it is the part of the littoral zone within the tidal range. This area can include several types of habitats with various sp ...

and subtidal zones, from shallow water to offshore

continental shelf A continental shelf is a portion of a continent that is submerged under an area of relatively shallow water, known as a shelf sea. Much of these shelves were exposed by drops in sea level during glacial periods. The shelf surrounding an islan ...

sediments.

References

Phyllodocida Annelid families {{Annelid-stub