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 67


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 68
Mind talisman Mind talisman 1 Rare 469
Fire talisman Fire talisman 1 Rare 1,878
Cosmic talisman Cosmic talisman 1 Rare 341
Body talisman Body talisman 1 Rare 503
Water talisman Water talisman 1 Rare 188
Earth talisman Earth talisman 1 Rare 166


Item Quantity Rarity GE market price
Steel platebody Steel platebody 1 Uncommon 1,013
Black claws Black claws 1 Uncommon 6,751
Black platebody Black platebody 1 Uncommon 2,922
Mithril axe Mithril axe 1 Uncommon 220
Rock-shell gloves Rock-shell gloves 1 Uncommon 949
Rock-shell boots Rock-shell boots 1 Uncommon 3,749
Black warhammer Black warhammer 1 Rare 401
Adamant longsword Adamant longsword 1 Rare 1,735
Adamant warhammer Adamant warhammer 1 Rare 2,242


Item Quantity Rarity GE market price
Poison ivy seed 5 Poison ivy seed 1 Uncommon 870
Belladonna seed 5 Belladonna seed 1 Uncommon 51
Herb seed 5 Guam seed 1 Uncommon 11
Herb seed 5 Marrentill seed 1 Uncommon 25
Herb seed 5 Tarromin seed 1 Uncommon 38
Herb seed 5 Harralander seed 1 Uncommon 80
Herb seed 5 Toadflax seed 1 Rare 924
Herb seed 5 Ranarr seed 1 Rare 35,275
Herb seed 5 Irit seed 1 Rare 84
Herb seed 5 Avantoe seed 1 Rare 970
Herb seed 5 Snapdragon seed 1 Rare 44,344
Herb seed 5 Cadantine seed 1 Rare 453
Herb seed 5 Lantadyme seed 1 Rare 1,013
Herb seed 5 Dwarf weed seed 1 Very rare 349
Herb seed 5 Torstol seed 1 Very rare 25,579


Item Quantity Rarity GE market price
Grimy guam leaf Grimy guam leaf 1 Uncommon 9
Grimy marrentill Grimy marrentill 1 Uncommon 12
Grimy tarromin Grimy tarromin 1 Uncommon 128
Grimy harralander Grimy harralander 1 Uncommon 536
Grimy ranarr weed Grimy ranarr weed 1 Rare 8,123
Grimy irit leaf Grimy irit leaf 1 Rare 1,095
Grimy avantoe Grimy avantoe 1 Rare 2,592
Grimy kwuarm Grimy kwuarm 1 Rare 2,601
Grimy cadantine Grimy cadantine 1 Rare 1,630
Grimy lantadyme Grimy lantadyme 1 Rare 1,994
Grimy dwarf weed Grimy dwarf weed 1 Rare 1,014


Item Quantity Rarity GE market price
Coins 100 Coins 27; 28; 42; 70; 137 Common Not sold
Raw lobster Raw lobster 1 Common 186
Raw bass Raw bass 1 Common 262
Tinderbox Tinderbox 1 Common 103
Rock-shell splinter Rock-shell splinter 1 Uncommon (1/64) 23,444
Rock-shell chunk Rock-shell chunk 1 Uncommon (1/64) 11,564
Rock-shell shard Rock-shell shard 1 Uncommon (1/64) 23,930
Casket Casket 1 Rare 1,049
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 9,247
Tooth half of key Tooth half of key 1 Common 16,961
Chaos talisman Chaos talisman 1 Common 230
Uncut sapphire Uncut sapphire 1 Common 928
Uncut emerald Uncut emerald 1 Uncommon 939
Uncut ruby Uncut ruby 1 Uncommon 1,744
Nature talisman Nature talisman 1 Uncommon 535
Steel arrow 5 Steel arrow 150 Uncommon 5,400
Rune arrow 5 Rune arrow 42 Uncommon 3,486
Rune javelin Rune javelin 5 Uncommon 540
Adamant javelin Adamant javelin 20 Uncommon 880
Runite bar Runite bar 1 Uncommon 12,465
Nature rune Nature rune 67 Uncommon 13,869
Law rune Law rune 45 Uncommon 10,260
Death rune Death rune 45 Uncommon 11,745
Rune battleaxe Rune battleaxe 1 Uncommon 24,619
Rune 2h sword Rune 2h sword 1 Uncommon 38,052
Rune sq shield Rune sq shield 1 Uncommon 22,694
Silver ore Silver ore 100 (noted) Uncommon 7,900
Dragonstone Dragonstone 1 Uncommon 17,499
Uncut diamond Uncut diamond 1 Rare 3,435
Dragon med helm Dragon med helm 1 Rare 59,269
Rune kiteshield Rune kiteshield 1 Rare 32,308
Rune spear Rune spear 1 Rare 12,130
Shield left half Shield left half 1 Rare 65,291
Dragon spear Dragon spear 1 Rare 37,241

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