Hydrothermal vents are commonly found near active volcanic areas and provide for a rich and complex environment for many biological organisms (archaea, bacteria, tube worms...). Many new hydrothermal vent systems are being discovered and many more are likely to be discovered in the future. My questions are which hydrothermal vent system is currently considered to be the tallest? What contribute to make that system larger? How old is the vent system? Are there any peculiar organisms associated with the system that haven't been found anywhere else?