Shell Shield

Shell Shield is a pet ability available exclusively to the turtle family of hunter pets, reducing pet damage taken by 50%.

It is functionally identical to the beetle family's Harden Carapace, the crab family's Harden Shell, and the shale spider family's Solid Shell.

Trivia
One of the oldest pet abilities still in the game, turtles who knew Shell Shield were initially highly sought after by hunters for soloing content or attempting to off-tank in dungeons. Prior to the Echoes of Doom patch (3.0.2), the only low-level turtles to know the ability were Kresh in the Wailing Caverns and Ghamoo-Ra in Blackfathom Deeps, making them popular and common pets around Azeroth.