Riftia pachyptila has the fastest growth rate of any known marine invertebrate. In this environment, water temperatures are extremely high due to geothermal heat. Definition of giant tube worm in the Definitions.net dictionary. In addition, their cylindrical bodies have a diameter of four centimeters. These organisms have been known to colonize a new site, grow to sexual maturity and increase in length to 4.9 feet (1.5 m) in less than two years. In the anteriormost part of the vestimentum, the ventral brain connects to the ventral nerve cord (A, B). Definition, Examples, Pathways and Processes ... (Riftia pachyptila) and chemosynthetic bacteria in hydrothermal vents. Chemotrophs are organisms that obtain energy through the oxidation of electron donors in their environments. Riftia pachyptila (Vent tube worm) Imported Taxonomic identifier i: 6426 : Taxonomic lineage i › Eukaryota › › Metazoa › › › › Spiralia › Lophotrochozoa › Annelida › Polychaeta › Palpata › Canalipalpata › Sabellida › Siboglinidae › Riftia. [ 7 ] Moreover, these worms live at the seafloor (environment lacking light energy). https://sites.google.com/site/groupbioproject/giant-tube-worm Instead of eating food like other animals, Riftia allows bacteria to live inside of it and provide its food. Meaning of giant tube worm. The anterior ventral nerve cord within the vestimental collar of Riftia pachyptila. What does giant tube worm mean? These worms can grow to sizes of up to 2.4 meters. Riftia pachyptila (Vent tube worm) Imported Taxonomic identifier i: 6426 : Taxonomic lineage i › Eukaryota › › Metazoa › › › › Spiralia › Lophotrochozoa › Annelida › Polychaeta › Palpata › Canalipalpata › Sabellida › Siboglinidae › Riftia. These molecules can be organic (chemoorganotrophs) or inorganic (chemolithotrophs). The Riftia pachyptila, commonly referred to as the giant tubeworm, is another case of the deep-sea gigantism. This worm, called Riftia pachyptila, is an unusual animal because it has no mouth or digestive tract and no apparent way to eat! This video is part of the series I Contain Multitudes, hosted by science journalist Ed Yong. ... Riftia pachyptila lives over a mile deep, and up to several miles deep, on the floor of the Pacific Ocean near black smokers, and it can tolerate extremely high hydrogen sulfide levels. Figure: Gollner Riftia pachyptila: Giant tube worms (Riftia pachyptila have an organ containing chemosynthetic bacteria instead of a gut. Most people chose this as the best definition of giant-tube-worm: Riftia pachyptila, a larg... See the dictionary meaning, pronunciation, and sentence examples. 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