The bottom of the sea is dark and lonely. Yet there is life usually isolated and located near some source of energy such as a deep sea vent. these vents are not continuous and in between there is a lot of empty space and totally alien environmental conditions especially between the bottom of the sea and the top of th3e ocean. Marine scientists studying life around deep-sea vents have discovered that some hardy species can survive the extreme change in pressure that occurs when a research submersible rises to the surface. The team’s findings, published in Conservation Biology, reveal how a species can be inadvertently carried by submersibles to new areas, with potentially damaging effects on marine ecosystems.