Nereididae (formerly spelled Nereidae) are a family of polychaete worms. It contains about 500 – mostly marine – species grouped into 42 genera. They may be commonly called ragworms or clam worms. The prostomium of Nereididae bears a pair of palps that are differentiated into two units. The proximal unit is much larger than the distal unit.

Ragworms spend their lives in U- or J-shaped burrows in the rich estuarine mud, extracting nutrients from their surroundings in various ways. A pair of hard pincer-like jaws (paragnaths) …

Hediste diversicolor, commonly known as a ragworm, is a polychaete worm in the family Nereididae. It lives in a burrow in the sand or mud of beaches and estuaries in intertidal zones in the north Atlantic.

rag worm, any of a group of mostly marine or shore worms of the class Polychaeta (phylum Annelida). A few species live in fresh water. Other common names include mussel worm, pileworm, and sandworm. Rag worms vary in length from 2.5 to 90 cm (1 inch to 3 feet); they are commonly brown, bright red, or bright green.

Alitta virens (common names include sandworm, sea worm, and king ragworm; older scientific names, including Nereis virens, are still frequently used) is an annelid worm that burrows in wet sand and mud.

Oct 7, 2008 · Steve Walker takes a close look at Ragworm, one of the most effective, most available and most frightening sea fishing baits. Ragworm are among the most common marine organisms and belong to the phylum annelida family of invertebrates.

Nereididae (Ragworms) is a family of segmented worms. They are biodiffusors. They are omnivores. They have parental care. Reproduction is semelparous, iteroparous, and gonochoristic. They rely on drag powered swimming to move around.

Ragworms are a favourite food of flatfish and wading birds, including curlew and bar-tailed godwits. Most often hidden in its burrow, though sometimes caught out hunting or hiding under rocks near to its burrow. They are highly segmented and look like a millipede. They are normally pale brown but males are bright green during the breeding season.

Ragworms are omnivores and predators. They eat tiny invertebrates, mud, detritus, phytoplankton and plankton. Ragworms get their food into their system by using a net-like mouth or using their jaws to eat at their food. They have a direct path from the mouth to the anus, without a stoppage in a heart or anything of that sort.

Hediste diversicolor is one of the commonest intertidal polychaetes in estuaries. Its body appears flattened with a prominent dorsal blood vessel. Adults may reach 6-12 cm in length and consist of between 90-120 chaetae bearing segments (chaetigers).