by Stygiomedusa gigantea, commonly known as the giant phantom jelly, is the only species in the monotypic genus of deep sea jellyfish, Stygiomedusa.
It is in the Ulmaridae family. With only around 110 sightings in 110 years, it is a jellyfish that is rarely seen, but believed to be widespread throughout the world, with the exception of the Arctic Ocean.
Larger S. gigantea have also been observed to be in the immediate vicinity of hydrothermal vents where large proportions of zooplankton are abundant.
This is in mesopelagic and bathypelagic depths.
The further away from hydrothermal vents, the smaller the medusae are—indicating that zooplankton are an important resource for the species.
Due to this, the medusae are well off during early spring to early summer when zooplankton biomass is enhanced
Source
It is in the Ulmaridae family. With only around 110 sightings in 110 years, it is a jellyfish that is rarely seen, but believed to be widespread throughout the world, with the exception of the Arctic Ocean.
Larger S. gigantea have also been observed to be in the immediate vicinity of hydrothermal vents where large proportions of zooplankton are abundant.
This is in mesopelagic and bathypelagic depths.
The further away from hydrothermal vents, the smaller the medusae are—indicating that zooplankton are an important resource for the species.
Due to this, the medusae are well off during early spring to early summer when zooplankton biomass is enhanced
Source
