The Land Shark is basically an improved Hard Mode Shark that swims through sand blocks instead of water blocks. It makes little digging particles like worms when it swims through blocks and, unlike Sharks, it will agro if you are near any soft block. It can only move through soft blocks like dirt, silt, sand, and quicksand.
- Shark Fin (100%)
Credit for this idea goes to zoomo.
His profile can be viewed here: http://www.terrariaonline.com/members/zoomo.71392/