The fisherman's lugworm sandworm Arenicola marina phylum Annelida sand beach coast ship fishing boat fisherman fish
The lugworm or sandworm, Arenicola marina, is a large marine worm of the phylum Annelida. 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. When fully grown, the lugworm of the coasts of Europe is up to 9 inches long and 3/8 inch in diameter. Other species on the North American coast range from 3 to 12 inches. The body is like that of an earthworm: ringed or segmented. Its head end, which is blackish-red and bears no tentacles or bristles, passes into a fatter middle part which is red. This in turn passes into a thinner yellowish-red tail end. The middle part has bristles along its sides and also pairs of feathery gills. There is a well-developed system of blood vessels with red blood rich in the oxygen-carrying pigment, haemoglobin. The animals are hermaphroditic; , functional reproductive organs of both sexes occur in the same individual. The eggs of one individual, however, are fertilized by the sperm of another.[
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Photo credit: © SOTK2011 / Alamy / Afripics
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