|Spawns In:||The Mines|
|Variations:||Lava Crab, Iridium Crab|
|Drops:|| Cherry Bomb (4%) 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.
To identify the Rock Crab, look out for rocks without shadows, sometimes slightly overlapping nearby rocks, as well as rocks on dirt patches (not including Nodes).
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.
Only occurs if the rock crab is standing in the middle of a 2x2 area next to a wall – if you hit it with a pickaxe when its shell has already been broken, you will instead hit and break an imaginary rock that isn't there instead of hitting the monster.
- 1.0: Introduced.
|Mines||Bats • Bug • Cave Fly • Duggy • Dust Sprite • Ghost • Grub • Lava Crab • Metal Head • Rock Crab • Shadow Brute • Shadow Shaman • Skeleton • Slimes • Squid Kid • Stone Golem|
|Skull Cavern||Armored Bug • Big Slime • Carbon Ghost • Iridium Bat • Iridium Crab • Lava Bat • Mummy • Purple Slime • Serpent|
|Bug Lair||Mutant Fly • Mutant Grub|
|The Farm||Wilderness Golem|