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The tail shaft, 2 to 3 in (5.1 to 7.6 cm) from it, is marked by a highly coiled cast of sand. The lugworm lies in this burrow with its head at the base of the head shaft, swallowing sand from time to time. This makes the columns of sand drop slightly, so there is a periodic sinking of the sand in the saucer-shaped depression.
Sand dollars live in waters below the mean low tide line, on or just beneath the surface of sandy and muddy areas. The common sand dollar, Echinarachnius parma , can be found in the Northern Hemisphere from the intertidal zone to the depths of the ocean, while the keyhole sand dollars (three species of the genus Mellita ) can be found on many a ...
Phragmatopoma californica, commonly known as the sandcastle worm, the honeycomb worm [1] or the honeycomb tube worm, [2] is a reef-forming marine polychaete worm belonging to the family Sabellarididae. It is dark brown in color with a crown of lavender tentacles and has a length of up to about 7.5 centimeters (3.0 in). [3]
Surfers beware: Bearded fireworms, caterpillarlike critters that look like they are straight out of a horror movie are lurking in the sand on Texas beaches. " Your worst nightmares are washing up ...
Echinodermata, including sea stars, brittle stars, sea urchins, sand dollars, sea cucumbers, crinoids, and sea daisies; Echiura, also known as spoon worms; Gnathostomulids, slender to thread-like worms, with a transparent body that inhabit sand and mud beneath shallow coastal waters;
Arenicolidae is a family of marine polychaete worms. They are commonly known as lugworms and the little coils of sand they produce are commonly seen on the beach. Arenicolids are found worldwide, mostly living in burrows in sandy substrates.
The blow lugworm (Arenicola marina), also known as sandworm, is a large species of marine worm.Its coiled castings are a familiar sight on a beach at low tide but the animal itself is rarely seen except by those who, from curiosity or to use as fishing bait, dig the worm out of the sand.
Abarenicola pacifica or the Pacific lugworm is a large species of polychaete worm found on the west coast of North America and also in Japan. The worms live out of sight in burrows under the sand and produce casts which are visible on the surface. Polychaetes, or marine bristle worms, have elongated bodies divided into many segments.