Purple Tidal Worm

There is one tameable creature with this look.

Purple Tidal Worm
Exotic family: Beast Masters only - level 10+.Exotic Family
Can only be used by Beast Mastery hunters that have reached level 10.
Can Be Tamed
50Chitterspine Caverns, Nazjatar
Cannot Be Tamed
Brinestone Cove, Nazjatar
Only present when the world quest Hungry Hungry Hydras is active. It spawns during combat with the Cracklemaw Colossus and is in a vehicle phase where you can't tame it.
Level scaling: 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.