Bathypolypus sponsalis

It possesses many morphological traits adapted to a deep sea environment, including large eggs, reduced gills, no ink sac, and subgelatinous tissues.

Bathypolypus sponsalis are found in areas ranging from the eastern Atlantic Ocean all the way to the Mediterranean Sea.

[6] Because they reside in benthic habitats, they rely a lot on the resources that they can find in that region, however they frequently undergo vertical migration in order to have access to pelagic prey that are found in other areas of the water column.

[1] During the early stages of their lifecycle, the Bathypolypus sponsalis hatches into planktonic organisms that float in the water column until they eventually mature and become adults that reside in benthic habitats on the sea floor.

[8] Bathypolypus sponsalis have very large eggs and spermatophores in order to cope with living in a benthic deep-sea environment.

[11] This solitary behavior not only provides a place for the eggs to be safe, it also reduces the risk of predation and fishing activities to the female.

[12] Other deep sea adaptations are the reduction of gills, which occurs in deep-sea environments because of the decrease in metabolic activity due to the cold temperature of the water in that ecosystem.