Biological carbon fixation, or carbon assimilation, is the process by which living organisms convert inorganic carbon to organic compounds. These organic compounds are then used to store energy and as
Cyanobacteria such as these carry out photosynthesis. Their emergence foreshadowed the evolution of many photosynthetic plants and oxygenated Earth's atmosphere.
Overview of the six known biological carbon fixation cycles
Riftia is a monotypic genus of polychaete annelid worms in the Siboglinidae familiy, which contains the sole species Riftia pachyptila, commonly known as the giant tubeworm or giant beardworm.
DSV Alvin, US Navy research submarine
Being extracted out of its tube
R. pachyptila community with extroflexion of red branchial plume[dubious – discuss]