Other organisms that reside in this region include copepods, ostracods, jellyfish, prawns, mysids and amphipods. Deepsea hydrothermal vents support dense benthic communities consisting mostly of filter feeders including tube worms, mussels and clams. There is also a thriving population of chemosynthetic bacteria that use the hydrogen sulfide emitted by the hydrothermal vents to produce biomass thus providing food material for the filter feeders. Organisms living in this habitat rely on food inputs from above such as settling organic detritus, settling of large animal carcasses and transport of organic matter via turbidity currents. These regions are characterized by high biological diversity despite the low biomass.
Biologists maintain that all food webs ultimately depend on primary production.