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 44


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 50
Mind talisman Mind talisman 1 Rare 322
Fire talisman Fire talisman 1 Rare 1,833
Cosmic talisman Cosmic talisman 1 Rare 288
Body talisman Body talisman 1 Rare 387
Water talisman Water talisman 1 Rare 174
Earth talisman Earth talisman 1 Rare 193


Item Quantity Rarity GE market price
Steel platebody Steel platebody 1 Uncommon 979
Black claws Black claws 1 Uncommon 3,550
Black platebody Black platebody 1 Uncommon 4,033
Mithril axe Mithril axe 1 Uncommon 205
Rock-shell gloves Rock-shell gloves 1 Uncommon 680
Rock-shell boots Rock-shell boots 1 Uncommon 1,438
Black warhammer Black warhammer 1 Rare 466
Adamant longsword Adamant longsword 1 Rare 1,697
Adamant warhammer Adamant warhammer 1 Rare 2,246


Item Quantity Rarity GE market price
Poison ivy seed 5 Poison ivy seed 1 Uncommon 512
Belladonna seed 5 Belladonna seed 1 Uncommon 39
Herb seed 5 Guam seed 1 Uncommon 4
Herb seed 5 Marrentill seed 1 Uncommon 6
Herb seed 5 Tarromin seed 1 Uncommon 5
Herb seed 5 Harralander seed 1 Uncommon 36
Herb seed 5 Toadflax seed 1 Rare 929
Herb seed 5 Ranarr seed 1 Rare 34,192
Herb seed 5 Irit seed 1 Rare 43
Herb seed 5 Avantoe seed 1 Rare 900
Herb seed 5 Snapdragon seed 1 Rare 41,664
Herb seed 5 Cadantine seed 1 Rare 480
Herb seed 5 Lantadyme seed 1 Rare 1,168
Herb seed 5 Dwarf weed seed 1 Very rare 275
Herb seed 5 Torstol seed 1 Very rare 65,307


Item Quantity Rarity GE market price
Grimy guam leaf Grimy guam leaf 1 Uncommon 9
Grimy marrentill Grimy marrentill 1 Uncommon 16
Grimy tarromin Grimy tarromin 1 Uncommon 97
Grimy harralander Grimy harralander 1 Uncommon 518
Grimy ranarr weed Grimy ranarr weed 1 Rare 7,006
Grimy irit leaf Grimy irit leaf 1 Rare 871
Grimy avantoe Grimy avantoe 1 Rare 2,109
Grimy kwuarm Grimy kwuarm 1 Rare 2,353
Grimy cadantine Grimy cadantine 1 Rare 1,662
Grimy lantadyme Grimy lantadyme 1 Rare 1,700
Grimy dwarf weed Grimy dwarf weed 1 Rare 809


Item Quantity Rarity GE market price
Coins 100 Coins 27; 28; 42; 70; 137 Common Not sold
Raw lobster Raw lobster 1 Common 110
Raw bass Raw bass 1 Common 96
Tinderbox Tinderbox 1 Common 53
Rock-shell splinter Rock-shell splinter 1 Uncommon (1/64) 23,862
Rock-shell chunk Rock-shell chunk 1 Uncommon (1/64) 11,794
Rock-shell shard Rock-shell shard 1 Uncommon (1/64) 23,016
Casket Casket 1 Rare 813
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 7,318
Tooth half of key Tooth half of key 1 Common 18,382
Chaos talisman Chaos talisman 1 Common 211
Uncut sapphire Uncut sapphire 1 Common 848
Uncut emerald Uncut emerald 1 Uncommon 841
Uncut ruby Uncut ruby 1 Uncommon 1,552
Nature talisman Nature talisman 1 Uncommon 499
Steel arrow 5 Steel arrow 150 Uncommon 4,800
Rune arrow 5 Rune arrow 42 Uncommon 2,814
Rune javelin Rune javelin 5 Uncommon 745
Adamant javelin Adamant javelin 20 Uncommon 1,120
Runite bar Runite bar 1 Uncommon 12,558
Nature rune Nature rune 67 Uncommon 14,673
Law rune Law rune 45 Uncommon 10,260
Death rune Death rune 45 Uncommon 9,990
Rune battleaxe Rune battleaxe 1 Uncommon 24,552
Rune 2h sword Rune 2h sword 1 Uncommon 37,982
Rune sq shield Rune sq shield 1 Uncommon 22,661
Silver ore Silver ore 100 (noted) Uncommon 7,200
Dragonstone Dragonstone 1 Uncommon 15,879
Uncut diamond Uncut diamond 1 Rare 3,215
Dragon med helm Dragon med helm 1 Rare 59,205
Rune kiteshield Rune kiteshield 1 Rare 32,202
Rune spear Rune spear 1 Rare 12,058
Shield left half Shield left half 1 Rare 65,377
Dragon spear Dragon spear 1 Rare 39,616

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