Blue Spiked Crab w/ Purple Markings

There are 4 tameable creatures with this look.

Blue Spiked Crab w/ Purple Markings
CrabsLevelLocation
Can Be Tamed
10-45The Broken Isles
Various ocean areas.
Can Be Tamed
10-45Azsuna; Suramar
Estuary border between Azsuna and Suramar.
Can Be Tamed
10-45The Broken Isles
Various ocean areas.
Can Be Tamed
30-35Abyssal Depths
Found at the bottom of Coldlight Chasm.
CrabsLevelLocation
Cannot Be Tamed
80Siren Isle
Found in a special 'storm' phase of Siren Isle that you can access after completing the zone's weekly quest (by participating in activities and killing various NPCs around Siren Isle) and unlocking Special Assignment: Storm's a Brewin. Once unlocked, speak to Suzie Boltwrench at Flotsam Shoal to enter or leave the storm phase at any time, even after you complete the assignment.
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.
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