Oenopotella ultraabyssalis is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
There is one subspecies: Oenopotella ultraabyssalis aleutica <small>A.V. Sysoev, 1988</small>
The length of the shell attains 12.8mm. This species is a non-broadcast spawner.
This marine species was found in the Kurile-Kamchatka Trench, Northern Pacific.