SMW Subobject for 1Magic defence bonus: -10Examine: • No one likes crabs... especially really big ones!
Disguised as a boulder:
• Heavy rock!Immune to venom: Not immuneAttack bonus: 0Magic Damage bonus: 0Ranged Strength bonus: 0Stab defence bonus: 225Defence level: 200Uses infobox: MonsterNPC ID: 2261Crush defence bonus: 175Release date: 1 August 2005Version anchor: 1Ranged level: 1Attack level: 50Combat level: 137Is variant of: Giant Rock CrabMagic attack bonus: 0Slash defence bonus: 200Attack style: CrushImmune to poison: Not immuneSize: 2Max hit: 9Range defence bonus: 250Is members only: trueHitpoints: 180Range attack bonus: 0Magic level: 1Name: Giant Rock CrabStrength bonus: 0Image: File:Giant Rock Crab.pngStrength level: 80Experience bonus: 10Attack speed: 4
SMW Subobject for 2Magic defence bonus: 10Examine: • No one likes crabs... especially really big ones!
Disguised as a boulder:
• Heavy rock!Immune to venom: Not immuneAttack bonus: 0Magic Damage bonus: 0Ranged Strength bonus: 0Stab defence bonus: 225Defence level: 200Uses infobox: MonsterNPC ID: 5940Crush defence bonus: 175Release date: 7 November 2005Version anchor: 2Ranged level: 1Attack level: 50Combat level: 137Is variant of: Giant Rock CrabMagic attack bonus: 0Slash defence bonus: 200Attack style: CrushImmune to poison: Not immuneSize: 2Max hit: 9Range defence bonus: 250Is members only: trueHitpoints: 180Range attack bonus: 0Magic level: 1Name: Giant Rock CrabStrength bonus: 0Image: File:Giant Rock Crab.pngStrength level: 80Experience bonus: 10Attack speed: 4
Giant rock crabs are massive versions of the weaker Rock crab. They lie in wait for prey, disguised as large boulders. When approached, they attack, unless they have become tolerant, in which case they remain as "boulders" - attempting to cast a spell on them gives the message "You can't attack this NPC."
Giant rock crabs are only initially aggressive if they are approached while dormant. Once they are moving and the targeted player is out of range, they stop being aggressive and will ignore players that don't attack them. They eventually become dormant boulders again after a while if they are not attacked.
- ^ In Waterbirth Island Dungeon a partner or a pet rock is required to open the door
The giant rock crab is one of few monsters in RuneScape that will retreat from battle when they become critically wounded. This can be troublesome, as they are found in a single-way combat area. This can be prevented by attacking them while their back is turned to a nearby wall, so that they move away from the player and back up into the wall. If they move too far away, the player will follow them and risk being attacked by another rock crab. There are several protruding sections of the walls in the area that can be used as safespots which are ideal as the crabs' main weakness is magic.
If one wishes to use melee, the crabs can be killed deeper into the cave where there are several spawns in multi-way combat. These crabs will still drop their unique items on the drop table.
Drop rates estimated based on 1,715 kills from the Drop Rate Project, unless otherwise cited.
| Item |
Quantity |
Rarity |
Price |
High Alch |
 | Bones | 1 | Always | 71 | 0 |
There is a 8/128 chance of rolling the herb drop table.
There is a 1/128 chance of rolling the rare seed drop table.
| Item |
Quantity |
Rarity |
Price |
High Alch |
 | Toadflax seed | 1 | 1/642.7 | 4,510 | 6 |
 | Irit seed | 1 | 1/944 | 40 | 3 |
 | Belladonna seed | 1 | 1/974.5 | 103 | 106 |
 | Poison ivy seed | 1 | 1/1,373.1 | 19 | 99 |
 | Avantoe seed | 1 | 1/1,373.1 | 305 | 4 |
 | Cactus seed | 1 | 1/1,438.5 | 75 | 59 |
 | Potato cactus seed | 1 | 1/2,013.9 | 12 | 84 |
 | Kwuarm seed | 1 | 1/2,013.9 | 202 | 6 |
 | Snapdragon seed | 1 | 1/3,020.8 | 91,342 | 36 |
 | Cadantine seed | 1 | 1/4,315.4 | 668 | 4 |
 | Lantadyme seed | 1 | 1/6,041.6 | 753 | 5 |
 | Snape grass seed | 3 | 1/7,552 | 8,904 | 168 |
 | Dwarf weed seed | 1 | 1/10,069.3 | 896 | 3 |
 | Torstol seed | 1 | 1/15,104 | 54,708 | 42 |
There is a 10/128 chance of rolling the talisman drop table.
There is a 1/128 chance of rolling the gem drop table.
| Item |
Quantity |
Rarity |
Price |
High Alch |
 | Nothing | N/A | 1/256.47; Never[d 1] | N/A | N/A |
 | Uncut sapphire | 1 | 1/512; 1/260[d 2] | 362 | 15 |
 | Uncut emerald | 1 | 1/1,024; 1/520[d 2] | 555 | 30 |
 | Uncut ruby | 1 | 1/2,048; 1/1,040[d 2] | 1,165 | 60 |
 | Nature talisman | 1 | 1/5,461.33; 1/2,773.33[d 2] | 366 | 2 |
 | Uncut diamond | 1 | 1/8,192; 1/4,160[d 2] | 2,778 | 120 |
 | Loop half of key | 1 | 1/16,384; 1/8,320[d 2] | 10,201 | 60 |
 | Tooth half of key | 1 | 1/16,384; 1/8,320[d 2] | 9,971 | 60 |
 | Rune javelin | 5 | 1/16,384; 1/8,320[d 2] | 700 | 1,200 |
 | Rune spear | 1 | 1/262,144; 1/15,600[d 2][d 3] | 11,660 | 12,480 |
 | Shield left half | 1 | 1/524,288; 1/31,200[d 2][d 3] | 65,224 | 66,000 |
 | Dragon spear | 1 | 1/699,050.67; 1/41,600[d 2][d 3] | 37,080 | 37,440 |
Combat stats
