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 No No
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 51
Mind talisman Mind talisman 1 Rare 366
Fire talisman Fire talisman 1 Rare 1,885
Cosmic talisman Cosmic talisman 1 Rare 588
Body talisman Body talisman 1 Rare 519
Water talisman Water talisman 1 Rare 225
Earth talisman Earth talisman 1 Rare 188


Item Quantity Rarity GE market price
Steel platebody Steel platebody 1 Uncommon 1,005
Black claws Black claws 1 Uncommon 6,143
Black platebody Black platebody 1 Uncommon 2,630
Mithril axe Mithril axe 1 Uncommon 221
Rock-shell gloves Rock-shell gloves 1 Uncommon 1,170
Rock-shell boots Rock-shell boots 1 Uncommon 3,113
Black warhammer Black warhammer 1 Rare 401
Adamant longsword Adamant longsword 1 Rare 1,721
Adamant warhammer Adamant warhammer 1 Rare 2,264


Item Quantity Rarity GE market price
Poison ivy seed 5 Poison ivy seed 1 Uncommon 829
Belladonna seed 5 Belladonna seed 1 Uncommon 42
Herb seed 5 Guam seed 1 Uncommon 15
Herb seed 5 Marrentill seed 1 Uncommon 22
Herb seed 5 Tarromin seed 1 Uncommon 31
Herb seed 5 Harralander seed 1 Uncommon 60
Herb seed 5 Toadflax seed 1 Rare 811
Herb seed 5 Ranarr seed 1 Rare 36,535
Herb seed 5 Irit seed 1 Rare 82
Herb seed 5 Avantoe seed 1 Rare 844
Herb seed 5 Snapdragon seed 1 Rare 48,164
Herb seed 5 Cadantine seed 1 Rare 292
Herb seed 5 Lantadyme seed 1 Rare 1,106
Herb seed 5 Dwarf weed seed 1 Very rare 410
Herb seed 5 Torstol seed 1 Very rare 38,505


Item Quantity Rarity GE market price
Grimy guam leaf Grimy guam leaf 1 Uncommon 11
Grimy marrentill Grimy marrentill 1 Uncommon 16
Grimy tarromin Grimy tarromin 1 Uncommon 154
Grimy harralander Grimy harralander 1 Uncommon 543
Grimy ranarr weed Grimy ranarr weed 1 Rare 8,776
Grimy irit leaf Grimy irit leaf 1 Rare 1,121
Grimy avantoe Grimy avantoe 1 Rare 2,412
Grimy kwuarm Grimy kwuarm 1 Rare 2,507
Grimy cadantine Grimy cadantine 1 Rare 1,493
Grimy lantadyme Grimy lantadyme 1 Rare 2,066
Grimy dwarf weed Grimy dwarf weed 1 Rare 1,099


Item Quantity Rarity GE market price
Coins 100 Coins 27; 28; 42; 70; 137 Common Not sold
Raw lobster Raw lobster 1 Common 160
Raw bass Raw bass 1 Common 214
Tinderbox Tinderbox 1 Common 127
Rock-shell splinter Rock-shell splinter 1 Uncommon (1/64) 23,444
Rock-shell chunk Rock-shell chunk 1 Uncommon (1/64) 11,668
Rock-shell shard Rock-shell shard 1 Uncommon (1/64) 23,930
Casket Casket 1 Rare 1,025
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 8,522
Tooth half of key Tooth half of key 1 Common 19,253
Chaos talisman Chaos talisman 1 Common 252
Uncut sapphire Uncut sapphire 1 Common 933
Uncut emerald Uncut emerald 1 Uncommon 995
Uncut ruby Uncut ruby 1 Uncommon 1,763
Nature talisman Nature talisman 1 Uncommon 517
Steel arrow 5 Steel arrow 150 Uncommon 5,100
Rune arrow 5 Rune arrow 42 Uncommon 3,738
Rune javelin Rune javelin 5 Uncommon 545
Adamant javelin Adamant javelin 20 Uncommon 920
Runite bar Runite bar 1 Uncommon 12,567
Nature rune Nature rune 67 Uncommon 13,735
Law rune Law rune 45 Uncommon 10,170
Death rune Death rune 45 Uncommon 11,025
Rune battleaxe Rune battleaxe 1 Uncommon 24,606
Rune 2h sword Rune 2h sword 1 Uncommon 37,967
Rune sq shield Rune sq shield 1 Uncommon 22,626
Silver ore Silver ore 100 (noted) Uncommon 7,900
Dragonstone Dragonstone 1 Uncommon 17,437
Uncut diamond Uncut diamond 1 Rare 3,865
Dragon med helm Dragon med helm 1 Rare 59,156
Rune kiteshield Rune kiteshield 1 Rare 32,293
Rune spear Rune spear 1 Rare 12,085
Shield left half Shield left half 1 Rare 65,453
Dragon spear Dragon spear 1 Rare 37,256

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.