Giant rock crab
Giant Rock Crab
Release date 1 August 2005 (Update)
Members? Yes
Combat level 137
Always drops Bones
No one likes crabs... especially really big ones!
Disguised as a boulder:
Heavy rock!
Combat info
Hitpoints 180
Aggressive Yes
Poisonous No
Max hit 9
Weakness Magic
Attack Styles
Melee (crush)
Slayer-icon Slayer info
Not assigned
Combat-icon Combat stats
Attack-icon Strength-icon Defence-icon Ranged-icon Magic-icon
50 80 200 1 1
Attack-icon Aggressive stats
White dagger White scimitar White warhammer Magic-icon Ranged-icon
+0 +0 +0 +0 +0
Defence-icon Defensive stats
White dagger White scimitar White warhammer Magic-icon Ranged-icon
+225 +200 +175 -10 +250
Other bonuses Immunities
Strength-icon RangedStrength-icon Attack-icon Poison hitsplat Venom hitsplat
+0  ? +0 Not immune Not immune
Attack speed
Monster attack speed 6

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.



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.



Item Quantity Rarity GE market price
Bones Bones 1 Always 55


Item Quantity Rarity GE market price
Water rune Water rune 1–39 Uncommon 5–195
Earth rune Earth rune 2–37 Uncommon 10–185
Air talisman Air talisman 1 Rare 69
Mind talisman Mind talisman 1 Rare 354
Fire talisman Fire talisman 1 Rare 1,978
Cosmic talisman Cosmic talisman 1 Rare 678
Body talisman Body talisman 1 Rare 585
Water talisman Water talisman 1 Rare 218
Earth talisman Earth talisman 1 Rare 167


Item Quantity Rarity GE market price
Steel platebody Steel platebody 1 Uncommon 1,009
Black claws Black claws 1 Uncommon 5,460
Black platebody Black platebody 1 Uncommon 3,670
Mithril axe Mithril axe 1 Uncommon 173
Rock-shell gloves Rock-shell gloves 1 Uncommon 1,105
Rock-shell boots Rock-shell boots 1 Uncommon 2,520
Black warhammer Black warhammer 1 Rare 385
Adamant longsword Adamant longsword 1 Rare 1,672
Adamant warhammer Adamant warhammer 1 Rare 2,245


Item Quantity Rarity GE market price
Poison ivy seed 5 Poison ivy seed 1 Uncommon 633
Belladonna seed 5 Belladonna seed 1 Uncommon 73
Herb seed 5 Guam seed 1 Uncommon 10
Herb seed 5 Marrentill seed 1 Uncommon 19
Herb seed 5 Tarromin seed 1 Uncommon 29
Herb seed 5 Harralander seed 1 Uncommon 57
Herb seed 5 Toadflax seed 1 Rare 1,045
Herb seed 5 Ranarr seed 1 Rare 35,278
Herb seed 5 Irit seed 1 Rare 63
Herb seed 5 Avantoe seed 1 Rare 1,061
Herb seed 5 Snapdragon seed 1 Rare 47,185
Herb seed 5 Cadantine seed 1 Rare 303
Herb seed 5 Lantadyme seed 1 Rare 1,350
Herb seed 5 Dwarf weed seed 1 Very rare 366
Herb seed 5 Torstol seed 1 Very rare 49,629


Item Quantity Rarity GE market price
Grimy guam leaf Grimy guam leaf 1 Uncommon 14
Grimy marrentill Grimy marrentill 1 Uncommon 18
Grimy tarromin Grimy tarromin 1 Uncommon 106
Grimy harralander Grimy harralander 1 Uncommon 510
Grimy ranarr weed Grimy ranarr weed 1 Rare 7,373
Grimy irit leaf Grimy irit leaf 1 Rare 1,051
Grimy avantoe Grimy avantoe 1 Rare 2,315
Grimy kwuarm Grimy kwuarm 1 Rare 2,375
Grimy cadantine Grimy cadantine 1 Rare 1,584
Grimy lantadyme Grimy lantadyme 1 Rare 1,834
Grimy dwarf weed Grimy dwarf weed 1 Rare 998


Item Quantity Rarity GE market price
Coins 100 Coins 27; 28; 42; 70; 137 Common Not sold
Raw lobster Raw lobster 1 Common 180
Raw bass Raw bass 1 Common 195
Tinderbox Tinderbox 1 Common 52
Rock-shell splinter Rock-shell splinter 1 Uncommon (1/64) 23,196
Rock-shell chunk Rock-shell chunk 1 Uncommon (1/64) 11,668
Rock-shell shard Rock-shell shard 1 Uncommon (1/64) 23,465
Casket Casket 1 Rare 914
Clue scroll (medium) Clue scroll (medium) 1 Very rare Not sold

Rare drop table

In addition to the drops above, this monster also has access to the rare drop table.

Show/hide rare drop table
Item Quantity Rarity GE market price
Coins 1000 Coins 3,000 Common Not sold
Loop half of key Loop half of key 1 Common 8,696
Tooth half of key Tooth half of key 1 Common 19,420
Chaos talisman Chaos talisman 1 Common 449
Uncut sapphire Uncut sapphire 1 Common 866
Uncut emerald Uncut emerald 1 Uncommon 942
Uncut ruby Uncut ruby 1 Uncommon 1,701
Nature talisman Nature talisman 1 Uncommon 545
Steel arrow 5 Steel arrow 150 Uncommon 4,950
Rune arrow 5 Rune arrow 42 Uncommon 3,444
Rune javelin Rune javelin 5 Uncommon 605
Adamant javelin Adamant javelin 20 Uncommon 1,260
Runite bar Runite bar 1 Uncommon 12,335
Nature rune Nature rune 67 Uncommon 15,142
Law rune Law rune 45 Uncommon 10,035
Death rune Death rune 45 Uncommon 10,755
Rune battleaxe Rune battleaxe 1 Uncommon 24,643
Rune 2h sword Rune 2h sword 1 Uncommon 37,961
Rune sq shield Rune sq shield 1 Uncommon 22,666
Silver ore Silver ore 100 (noted) Uncommon 7,700
Dragonstone Dragonstone 1 Uncommon 18,084
Uncut diamond Uncut diamond 1 Rare 3,459
Dragon med helm Dragon med helm 1 Rare 59,419
Rune kiteshield Rune kiteshield 1 Rare 32,136
Rune spear Rune spear 1 Rare 12,118
Shield left half Shield left half 1 Rare 66,193
Dragon spear Dragon spear 1 Rare 37,526

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