Found just northeast of the Banks of Life. It is flagged tameable, but its level is currently too high. It has a purple spectral effect and leaves behind a trail of rainbows.
Level scaling: In Shadowlands most NPCs will scale with the Hunter's level, within the constraints of their level range. Hunters can tame regular NPCs up to 2 levels higher than them, but can only tame elite NPCs of the hunter's level or below.