What is Giant tube worm?
{{Taxobox | name = Giant tube worm | image = Nur04505.jpg | image_width = 250px | regnum = [[Animal]]ia | phylum = [[Annelid]]a | classis = [[Polychaete|Polychaeta]] | familia = [[Siboglinidae]] | genus = '''''Riftia''''' | binomial = ''Riftia pachyptila'' | binomial_authority = M.L. Jones, 1981 }} The '''Giant tube worm''' (''Riftia pachyptila'') is an [[annelid]]. They live on the floor of the [[ocean]]s (mainly Pacific Ocean), usually near [[black smoker]]s, a type of [[hydrothermal vent]]. They can tolerate extremely high [[temperature]]s and levels of [[sulfur]]. They live in [[symbiosis]] with certain [[bacteria]]. The bacteria enter the mouth of a young tube worm, but when the worm gets older its mouth and gut seal up, trapping the bacteria forever. These bacteria are fed with sulfur [[chemical compound|compounds]] and [[oxygen]]. The bacteria then turn these compounds into [[organic chemistry|organic]] [[molecule]]s on which the host worms feed. {{biology-stub}} [[Category:Annelids]]