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''Alitta virens'' (common names include ''sandworm'' and ''king ragworm''; older scientific names including ''Nereis virens'' are still frequently used) is an annelid worm that burrows in wet sand and mud. It is classified as a polychaete in the family Nereididae .〔 Sandworms make up a large part of the live sea-bait industry. To fulfill the needs of this industry, some sandworms are commercially grown.〔(De kweek van zagers op landbouwbedrijven in Zeeland )〕 "Sandworming", or the harvesting of sandworms from mudflats, employs over 1,000 people in Maine. , the population of sandworms had diminished greatly over the preceding few years due in large part to overharvesting before the worms are able to reproduce by spawning. Sandworms eat seaweed and microorganisms. They have many distinctive traits, including * often reaching great length, sometimes exceeding four feet * numerous, highly vascularized parapodia along both sides of their bodies * blue heads with two large pincer teeth which are capable of biting humans 〔(【引用サイトリンク】 King Ragworm )〕 The parapodia function both as external gills (the animal's primary respiratory surfaces), and as means of locomotion (appearing much like short legs). ==Gallery== Alitta virens (frontal).jpg File:Alitta virens prostomium.jpg| File:Alitta virens head (ventrolateral).jpg| File:Alitta virens pharynx (lateral).jpg| File:Alitta virens pharynx (dorsal).jpg| File:Alitta virens pharynx (anterior).jpg| 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Alitta virens」の詳細全文を読む スポンサード リンク
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