Short movie sequence of the tiny worm /observations/2392384 feeding.
(The rapidly moving bits are another creature, Spionidae, feeding)
Polychaete living with a bat star.
San Diego County, California, US
Egg mass; anchored into the sand on right (pointy) side. ID as per Rebecca Johnson - thanks!
Spaghetti worm of some sort? Under rock - possibly dropped onto sand from hole above. Hard to say how long it would have been if extended, but the curled-up ball was about 1" long.
The annelids (also called "ringed worms"), formally called Annelida (from Latin anellus "little ring"), are a large phylum of segmented worms, with over 2,000 modern species including ragworms, earthworms and leeches. They are found in marine environments from tidal zones to hydrothermal vents, in freshwater, and in moist terrestrial environments.They are bilaterally symmetrical, triploblastic, coelomate organisms.They have parapodia for locomotion. Although most textbooks still use the traditional division into polychaetes (almost all marine), oligochaetes (which include...