Question: where is prokaryotic life found around hydrothermal vents

title: Hydrothermal vent
text: A black smoker or deep sea vent is a type of hydrothermal vent found on the seabed , typically in the bathyal zone ( with largest frequency in depths from 2500 m to 3000 m ) , but also in lesser depths as well as deeper in abyssal zone . They appear as black , chimney - like structures that emit a cloud of black material . Black smokers typically emit particles with high levels of sulfur - bearing minerals , or sulfides . Black smokers are formed in fields hundreds of meters wide when superheated water from below Earth 's crust comes through the ocean floor ( water may attain temperatures above 400 ° C ) . This water is rich in dissolved minerals from the crust , most notably sulfides . When it comes in contact with cold ocean water , many minerals precipitate , forming a black , chimney - like structure around each vent . The deposited metal sulfides can become massive sulfide ore deposits in time .