As they mature they migrate to progressively greater depths, an ontogenetic descent, and this reaches to about 1500 m, the depth at which the largest individual collected to date was recorded, it had a mantle length of 243mm and was a subadult.
Over time, these creatures migrate to increasingly greater depths, undergoing an ontogenetic descent that reaches about 1500 meters, the deepest point at which a specimen has been found. This individual measured 243 mm in mantle length and was a subadult.