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 56


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 59
Mind talisman Mind talisman 1 Rare 341
Fire talisman Fire talisman 1 Rare 1,965
Cosmic talisman Cosmic talisman 1 Rare 604
Body talisman Body talisman 1 Rare 355
Water talisman Water talisman 1 Rare 225
Earth talisman Earth talisman 1 Rare 167


Item Quantity Rarity GE market price
Steel platebody Steel platebody 1 Uncommon 1,010
Black claws Black claws 1 Uncommon 5,224
Black platebody Black platebody 1 Uncommon 3,665
Mithril axe Mithril axe 1 Uncommon 176
Rock-shell gloves Rock-shell gloves 1 Uncommon 906
Rock-shell boots Rock-shell boots 1 Uncommon 2,282
Black warhammer Black warhammer 1 Rare 381
Adamant longsword Adamant longsword 1 Rare 1,716
Adamant warhammer Adamant warhammer 1 Rare 2,331


Item Quantity Rarity GE market price
Poison ivy seed 5 Poison ivy seed 1 Uncommon 784
Belladonna seed 5 Belladonna seed 1 Uncommon 61
Herb seed 5 Guam seed 1 Uncommon 7
Herb seed 5 Marrentill seed 1 Uncommon 8
Herb seed 5 Tarromin seed 1 Uncommon 29
Herb seed 5 Harralander seed 1 Uncommon 44
Herb seed 5 Toadflax seed 1 Rare 928
Herb seed 5 Ranarr seed 1 Rare 30,431
Herb seed 5 Irit seed 1 Rare 51
Herb seed 5 Avantoe seed 1 Rare 1,500
Herb seed 5 Snapdragon seed 1 Rare 41,007
Herb seed 5 Cadantine seed 1 Rare 372
Herb seed 5 Lantadyme seed 1 Rare 1,581
Herb seed 5 Dwarf weed seed 1 Very rare 434
Herb seed 5 Torstol seed 1 Very rare 43,789


Item Quantity Rarity GE market price
Grimy guam leaf Grimy guam leaf 1 Uncommon 13
Grimy marrentill Grimy marrentill 1 Uncommon 13
Grimy tarromin Grimy tarromin 1 Uncommon 118
Grimy harralander Grimy harralander 1 Uncommon 507
Grimy ranarr weed Grimy ranarr weed 1 Rare 6,803
Grimy irit leaf Grimy irit leaf 1 Rare 962
Grimy avantoe Grimy avantoe 1 Rare 2,319
Grimy kwuarm Grimy kwuarm 1 Rare 2,152
Grimy cadantine Grimy cadantine 1 Rare 1,496
Grimy lantadyme Grimy lantadyme 1 Rare 1,682
Grimy dwarf weed Grimy dwarf weed 1 Rare 908


Item Quantity Rarity GE market price
Coins 100 Coins 27; 28; 42; 70; 137 Common Not sold
Raw lobster Raw lobster 1 Common 139
Raw bass Raw bass 1 Common 169
Tinderbox Tinderbox 1 Common 57
Rock-shell splinter Rock-shell splinter 1 Uncommon (1/64) 23,196
Rock-shell chunk Rock-shell chunk 1 Uncommon (1/64) 11,772
Rock-shell shard Rock-shell shard 1 Uncommon (1/64) 23,465
Casket Casket 1 Rare 884
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 9,330
Tooth half of key Tooth half of key 1 Common 21,171
Chaos talisman Chaos talisman 1 Common 481
Uncut sapphire Uncut sapphire 1 Common 793
Uncut emerald Uncut emerald 1 Uncommon 911
Uncut ruby Uncut ruby 1 Uncommon 1,610
Nature talisman Nature talisman 1 Uncommon 349
Steel arrow 5 Steel arrow 150 Uncommon 4,650
Rune arrow 5 Rune arrow 42 Uncommon 3,318
Rune javelin Rune javelin 5 Uncommon 615
Adamant javelin Adamant javelin 20 Uncommon 1,280
Runite bar Runite bar 1 Uncommon 12,527
Nature rune Nature rune 67 Uncommon 14,405
Law rune Law rune 45 Uncommon 9,720
Death rune Death rune 45 Uncommon 11,115
Rune battleaxe Rune battleaxe 1 Uncommon 24,589
Rune 2h sword Rune 2h sword 1 Uncommon 37,981
Rune sq shield Rune sq shield 1 Uncommon 22,673
Silver ore Silver ore 100 (noted) Uncommon 7,300
Dragonstone Dragonstone 1 Uncommon 20,622
Uncut diamond Uncut diamond 1 Rare 3,641
Dragon med helm Dragon med helm 1 Rare 59,068
Rune kiteshield Rune kiteshield 1 Rare 32,251
Rune spear Rune spear 1 Rare 12,052
Shield left half Shield left half 1 Rare 67,094
Dragon spear Dragon spear 1 Rare 37,325

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