Friday, 12 November 2010
The lugworm (Arenicola marina)
When fully grown, the lugworm of the coasts of Europe is up to 9 inches long and 3/8ths inch in diameter. 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.