English: Extreme aquatic habitats and their extremophiles and molecules
(a) Hydrothermal vents: The hyperthermophilic Thermotoga neapolitana, a hydrogen-producing bacterium isolated at “Secca Fumosa” in the Gulf of Pozzuoli, Naples, Italy. (b) Salines: The halophilic Chromohalobacter salexigens, a bacterium isolated at the island of Bonaire, Netherlands Antilles. The osmoadaptation is achieved by the accumulation of several types of osmolytes such as ectoine and glycerols. (c) Arctic marine sediment: The marine psycrophile Colwellia psychrerythraea, producing a cold-active aminopeptidase (ColAP), isolated from Arctic marine sediments.