Risso's dolphin
There are a number of known predators that prey on Ocythoe. These are lancet fishes ("Alepisaurus borealis" and "A. ferox"), tunas ("Thunnus alalunga, T. thunnus, and Germon germon)", and Risso's dolphin ("Grampus griseus"). These predators have a large vertical range, and typically prey on "O. tuberculata" between 100 and 200 meters.