Hydrothermal VentsPacific OceanSeawaterPolychaetaOceans and SeasEpsilonproteobacteriaMytilidaeAtlantic OceanDecapoda (Crustacea)Marine BiologyBivalviaChemoautotrophic GrowthGastropodaPhylogenyRNA, Ribosomal, 16SVolcanic EruptionsGeologic SedimentsDNA, ArchaealGammaproteobacteriaAquatic OrganismsEcosystemSea UrchinsArchaeaInvertebratesWater MicrobiologyDNA, RibosomalSymbiosisIsopodaBiodiversityThermococcalesAnnelidaSequence Analysis, DNAGram-Negative Chemolithotrophic BacteriaHot TemperatureMolecular Sequence DataBacteriaThermococcusSulfurMediterranean SeaHot SpringsBase CompositionGillsTemperatureGeographyCarbonCrustaceaDNA, BacterialSulfidesIndian OceanPiscirickettsiaceaePyrococcusBacterial Physiological PhenomenaCarbon CycleGeological PhenomenaHydrostatic PressureAnomuraMethaneProteobacteriaSea AnemonesPetroleum PollutionGenes, rRNADeltaproteobacteriaAlcanivoraceaeGeologyGram-Negative Anaerobic BacteriaAntarctic RegionsReproductive Physiological PhenomenaThiosulfatesNorth SeaSpecies SpecificityMid-Atlantic RegionRNA, ArchaealTelluriumRNA, BacterialAnthozoaBiogenesisMolluscaSulfate AdenylyltransferaseBiological EvolutionSea CucumbersSulfur-Reducing BacteriaBacteria, AnaerobicHydrogenGreeceFishesAnaerobiosisOxidation-ReductionGenes, ArchaealGenetic VariationRNA, Ribosomal, 18SGenome, ArchaealBacterial Typing Techniques