Sand Sharks

The Sand Shark is a Hardmode enemy found in the Desert Biome only during a Sandstorm. It is able to "swim" through all varieties of Sand, Hardened Sand, and Sandstone Blocks, but will collide normally against any other block. When it draws near a player, it will lunge out of the sand to attack.

The Sand Shark only appears in ordinary Deserts. There are other variants for different versions of the Desert:
 * Bone Biter in the Corrupted Desert
 * Crystal Thresher in the Hallowed Desert
 * Flesh Reaver in the Crimson Desert

Trivia

 * Cenx confirmed that the inspiration for the enemy was a joke with Safemanda's daughter.
 * The sound the dash attack makes seems to be the same as the sound from the Vampire.