Blow lugworm egg Arenicola marina
The blow lugworm (Arenicola marina), also known as sandworm, is a large species of marine worm. Its coiled castins 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. In the video I made you can see a egg blow lugworm, Arenicola marina, anchored to the Mediterranean sea floor at about 40 cm depth.