Usually above the thermocline. Its distribution varies seasonally, reaching higher latitudes in both the northern and southern hemispheres only during the respective warm seasons. Usually found in deep (over 100 m) blue water with surface temperatures over 22°C and salinities of 35 to 37 ppt. Currents of 0.5 to 2 knots occur over much of its habitat.
- North-West Atlantic Ocean species (NWARMS) http://www.marinespecies.org/aphia.php?p=sourcedetails&id=2901
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