|Spawns In:||The Mines|
|Variations:||Lava Crab Iridium Crab Rock Crab (dangerous) Lava Crab (dangerous)|
|Drops:|| Cherry Bomb (40%) Crab (15%) Dwarf Scroll I (0.5%) Dwarf Scroll IV (0.1%)|
If reached bottom of Mines:Diamond (0.05%) Prismatic Shard (0.05%)
They disguise themselves as stones, sometimes surprising the player. When immobile, they are invulnerable to attack, though they can be hit with a pickaxe to knock them back, making them mobile again.
Rock Crabs may be differentiated from rocks by striking them with a weapon. A Rock Crab will make a knocking sound and a zero damage indicator will pop up when hit with a weapon, while a rock will not.
The Rock Crab can only be dealt damage if it is mobile, and not hiding beneath its shell. Strike an immobile Rock Crab with a pickaxe to make it mobile again.
Striking a Rock Crab with a pickaxe enough times will knock the shell off of its back, and will cause it to flee. Alternatively, setting off a bomb near a Rock Crab can remove its shell, and will cause it to flee as well.
- 1.0: Introduced.
- 1.4: Fixed bug that caused striking an unshelled crab with a pickaxe to produce the same sounds and debris as hitting a rock. Dropped Crabs now always bounce around before being taken into inventory, instead of bouncing only when inventory was full.