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Giant rock crab

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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 target them gives the message "Invalid target."

Giant Rock Crabs are good droppers of charms, as they drop 3 of them at a time. They also drop various black equipment (platebody and claws), worth a decent sum of coins. They are the only droppers of rock-shell parts, which are needed to create Rock-shell armour.


Chaos Tunnels entrances

Use the middle south entrance just east of the wizard who teleports players to the Abyss. This is labelled entrance number 2 and goes directly to the giant rock crabs.


Giant Rock Crabs have a fairly high resistance to Melee and Ranged attacks, and thus are only effectively killed using Magic.

In the Chaos Tunnels, they will eventually lose aggression. When they do, just leave the cave via the rope exit. Then just go straight back down the crevice.


The Giant Rock Crab is one of few monsters that will retreat from battle when they become critically wounded.



Item Quantity Rarity GE price


Item Quantity Rarity GE price
Water runeWater rune1–39Common14–546
Earth runeEarth rune1–40Common13–520
Air talismanAir talisman1Uncommon232
Mind talismanMind talisman1Uncommon513
Fire talismanFire talisman1Uncommon1,500
Cosmic talismanCosmic talisman1Rare348
Body talismanBody talisman1Rare274
Water talismanWater talisman1Uncommon5,637
Earth talismanEarth talisman1Uncommon1,727
Nature talismanNature talisman1Rare991
Chaos talismanChaos talisman1Uncommon1,141


Item Quantity Rarity GE price
Steel platebodySteel platebody1Common1,780
Black clawBlack claw1Common[1]1,059
Off-hand black clawOff-hand black claw1Common[1]807
Black platebodyBlack platebody1Common1,976
Mithril hatchetMithril hatchet1Common1,096
Rock-shell glovesRock-shell gloves1Uncommon13,082
Rock-shell bootsRock-shell boots1Uncommon6,354
Black warhammerBlack warhammer1Uncommon1,260
Off-hand black warhammerOff-hand black warhammer1Uncommon400
Adamant longswordAdamant longsword1Uncommon3,989
Adamant warhammerAdamant warhammer1Rare2,720
  1. ^ a b Main hand and off hand claws are dropped together.


No charmGold charmGreen charmCrimson charmBlue charm
Represents a 90% confidence range.
Based on a sample of 6,143 kills.
3 charms are dropped at a time.
Add data to the log
(Requires JavaScript to be enabled)


Item Quantity Rarity GE price
Poison ivy seed 5Poison ivy seed1Uncommon80
Belladonna seed 5Belladonna seed1Uncommon468
Guam seed 5Guam seed1Uncommon11
Marrentill seed 5Marrentill seed1Uncommon10
Tarromin seed 5Tarromin seed1Uncommon19
Harralander seed 5Harralander seed1Uncommon13
Toadflax seed 5Toadflax seed1Uncommon910
Ranarr seed 5Ranarr seed1Rare1,019
Irit seed 5Irit seed1Rare418
Avantoe seed 5Avantoe seed1Rare273
Snapdragon seed 5Snapdragon seed1Rare468
Cadantine seed 5Cadantine seed1Rare5,208
Lantadyme seed 5Lantadyme seed1Rare985
Kwuarm seed 5Kwuarm seed1Rare5,655
Dwarf weed seed 5Dwarf weed seed1Very rare991
Torstol seed 5Torstol seed1Very rare3,328


Item Quantity Rarity GE price
Grimy guamGrimy guam1Uncommon85
Grimy marrentillGrimy marrentill1Uncommon114
Grimy tarrominGrimy tarromin1Uncommon35
Grimy harralanderGrimy harralander1Uncommon78
Grimy ranarrGrimy ranarr1Rare2,500
Grimy iritGrimy irit1Rare3,010
Grimy avantoeGrimy avantoe1Rare2,430
Grimy kwuarmGrimy kwuarm1Rare4,780
Grimy cadantineGrimy cadantine1Rare4,984
Grimy lantadymeGrimy lantadyme1Rare3,584
Grimy dwarf weedGrimy dwarf weed1Rare3,454


Item Quantity Rarity GE price
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common99
Raw bassRaw bass1Common234
Rock-shell splinterRock-shell splinter1Uncommon11,332
Rock-shell chunkRock-shell chunk1Rare8,399
Rock-shell shardRock-shell shard1Rare8,125
Clue scroll (medium)Clue scroll (medium)1Very rareNot sold
Starved ancient effigyStarved ancient effigy1Very rareNot sold

Rare drop table dropsEdit

This monster has access to the rare drop table.
A ring of wealth, luck potion or collector's insignia are not required to access the table.
Show/hide rare drop table
Item Quantity Rarity GE price
Coins 1000Coins250–500; 3,000Common250–3,000
Uncut sapphireUncut sapphire1Common872
Uncut emeraldUncut emerald1Common1,561
Uncut rubyUncut ruby1Common2,489
Uncut diamondUncut diamond1Common3,922
Uncut diamondUncut diamond45–55 (noted)Rare176,490–215,710
Loop half of a keyLoop half of a key1Common17,640
Tooth half of a keyTooth half of a key1Common24,473
Uncut dragonstoneUncut dragonstone1Uncommon11,898
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare535,410–654,390
Dragon longswordDragon longsword1Common57,287
Dragon spearDragon spear1Rare35,763
BattlestaffBattlestaff180–220 (noted)Rare1,267,020–1,548,580
Rune javelinRune javelin5Rare930
Rune platebodyRune platebody1Uncommon37,537
Rune platebodyRune platebody15–25 (noted)Rare563,055–938,425
Shield left halfShield left half1Rare63,809
Dragon helmDragon helm1Uncommon58,177
Rune arrowheads 5Rune arrowheads113–137Common19,323–23,427
Onyx bolts 5Onyx bolts135–165Very rare1,087,290–1,328,910
Vecna skullVecna skull1Very rare71,285
Chaos talismanChaos talisman1Rare1,141
Nature talismanNature talisman1Rare991
Water talismanWater talisman65–82 (noted)Rare366,405–462,234
Earth talismanEarth talisman65–82 (noted)Rare112,255–141,614
Fire talismanFire talisman25–35 (noted)Rare37,500–52,500
Raw lobsterRaw lobster135–165 (noted)Common13,365–16,335
Raw sharkRaw shark225–275 (noted)Uncommon231,975–283,525
Big bonesBig bones72–90 (noted)Uncommon25,560–31,950
Dragon bonesDragon bones180–220 (noted)Rare292,140–357,060
CoalCoal200–1,100 (noted)Uncommon36,600–201,300
Gold oreGold ore90–110 (noted)Common13,230–16,170
Adamantite oreAdamantite ore180–220 (noted)Uncommon225,000–275,000
Adamant barAdamant bar14–16 (noted)Common32,942–37,648
Adamant barAdamant bar135–165 (noted)Rare317,655–388,245
Runite oreRunite ore90–110 (noted)Rare1,034,100–1,263,900
Rune barRune bar(noted)Common42,105
Rune barRune bar45–55 (noted)Rare631,575–771,925
Grimy torstolGrimy torstol90–110 (noted)Uncommon378,450–462,550
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon362,160–442,640
Super restore (4)Super restore (4)45–55 (noted)Uncommon227,025–277,475
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon149,355–182,545
Lantadyme seed 5Lantadyme seed14–16Uncommon13,790–15,760
Dwarf weed seed 5Dwarf weed seed14–16Uncommon13,874–15,856
Magic seed 5Magic seed4Uncommon478,728
Palm tree seed 5Palm tree seed10Rare1,725,730
FlaxFlax450–550 (noted)Common4,500–5,500
Molten glassMolten glass45–55 (noted)Common9,945–12,155
Soft claySoft clay450–550 (noted)Uncommon182,700–223,300
Yew logsYew logs68–82Uncommon12,648–15,252
Yew logsYew logs675–825 (noted)Rare125,550–153,450
Teak plankTeak plank45–55 (noted)Uncommon27,630–33,770
Mahogany plankMahogany plank270–330 (noted)Rare571,320–698,280
Brawling gloves (Melee)Brawling gloves (Melee)1Very rareNot sold
Brawling gloves (Magic)Brawling gloves (Magic)1Very rareNot sold
Brawling gloves (Ranged)Brawling gloves (Ranged)1Very rareNot sold
Brawling gloves (Agility)Brawling gloves (Agility)1Very rareNot sold
Brawling gloves (Cooking)Brawling gloves (Cooking)1Very rareNot sold
Brawling gloves (FM)Brawling gloves (FM)1Very rareNot sold
Brawling gloves (Fishing)Brawling gloves (Fishing)1Very rareNot sold
Brawling gloves (Hunter)Brawling gloves (Hunter)1Very rareNot sold
Brawling gloves (Mining)Brawling gloves (Mining)1Very rareNot sold
Brawling gloves (Prayer)Brawling gloves (Prayer)1Very rareNot sold
Brawling gloves (Smithing)Brawling gloves (Smithing)1Very rareNot sold
Brawling gloves (Thieving)Brawling gloves (Thieving)1Very rareNot sold
Brawling gloves (WC)Brawling gloves (WC)1Very rareNot sold
Crystal triskelion fragment 1Crystal triskelion fragment 11Very rareNot sold
Crystal triskelion fragment 2Crystal triskelion fragment 21Very rareNot sold
Crystal triskelion fragment 3Crystal triskelion fragment 31Very rareNot sold

Universal dropsEdit

Universal drops are dropped by nearly every monster outside of Daemonheim.
These drops are dropped alongside main drops.
Item Quantity Rarity GE price
Key tokenKey token1RareNot sold


  • After the 27 May 2009 update, Giant Rock Crabs dropped Charms in groups of three instead of ten. This hidden update initially angered players, though complaints died down as the rate of charm dropping was also increased.
Facts about "Giant rock crab"RDF feed
All Combat experience399 +
All Combat level95 +
All Is members onlytrue
All Release date1 August 2005 +
Combat experience399 +
Combat level95 +
Drop JSON{ "name": "Bones", "quantity": [1,1], "rarity": "Always" }, { "name": "Water rune", "quantity": [1,39], "rarity": "Common" }, { "name": "Earth rune", "quantity": [1,40], "rarity": "Common" }, { "name": "Air talisman", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Mind talisman", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Fire talisman", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Cosmic talisman", "quantity": [1,1], "rarity": "Rare" }, { "name": "Body talisman", "quantity": [1,1], "rarity": "Rare" }, { "name": "Water talisman", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Earth talisman", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Nature talisman", "quantity": [1,1], "rarity": "Rare" }, { "name": "Chaos talisman", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Steel platebody", "quantity": [1,1], "rarity": "Common" }, { "name": "Black claw", "quantity": [1,1], "rarity": "Common" }, { "name": "Off-hand black claw", "quantity": [1,1], "rarity": "Common" }, { "name": "Black platebody", "quantity": [1,1], "rarity": "Common" }, { "name": "Mithril hatchet", "quantity": [1,1], "rarity": "Common" }, { "name": "Rock-shell gloves", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Rock-shell boots", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Black warhammer", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Off-hand black warhammer", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Adamant longsword", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Adamant warhammer", "quantity": [1,1], "rarity": "Rare" }, { "name": "Poison ivy seed", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Belladonna seed", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Guam seed", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Marrentill seed", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Tarromin seed", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Harralander seed", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Toadflax seed", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Ranarr seed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Irit seed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Avantoe seed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Snapdragon seed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Cadantine seed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Lantadyme seed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Kwuarm seed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Dwarf weed seed", "quantity": [1,1], "rarity": "Very rare" }, { "name": "Torstol seed", "quantity": [1,1], "rarity": "Very rare" }, { "name": "Grimy guam", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Grimy marrentill", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Grimy tarromin", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Grimy harralander", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Grimy ranarr", "quantity": [1,1], "rarity": "Rare" }, { "name": "Grimy irit", "quantity": [1,1], "rarity": "Rare" }, { "name": "Grimy avantoe", "quantity": [1,1], "rarity": "Rare" }, { "name": "Grimy kwuarm", "quantity": [1,1], "rarity": "Rare" }, { "name": "Grimy cadantine", "quantity": [1,1], "rarity": "Rare" }, { "name": "Grimy lantadyme", "quantity": [1,1], "rarity": "Rare" }, { "name": "Grimy dwarf weed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Coins", "quantity": [23,137], "rarity": "Common" }, { "name": "Raw lobster", "quantity": [1,1], "rarity": "Common" }, { "name": "Raw bass", "quantity": [1,1], "rarity": "Common" }, { "name": "Tinderbox", "quantity": [1,1], "rarity": "Common" }, { "name": "Casket", "quantity": [1,1], "rarity": "Rare" }, { "name": "Rock-shell splinter", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Rock-shell chunk", "quantity": [1,1], "rarity": "Rare" }, { "name": "Rock-shell shard", "quantity": [1,1], "rarity": "Rare" }, { "name": "Clue scroll (medium)", "quantity": [1,1], "rarity": "Very rare" }, { "name": "Starved ancient effigy", "quantity": [1,1], "rarity": "Very rare" } and { "name": "Key token", "quantity": [1,1], "rarity": "Rare" }
Drops itemBones +, Water rune +, Earth rune +, Air talisman +, Mind talisman +, Fire talisman +, Cosmic talisman +, Body talisman +, Water talisman +, Earth talisman +, Nature talisman +, Chaos talisman +, Steel platebody +, Black claw +, Off-hand black claw +, Black platebody +, Mithril hatchet +, Rock-shell gloves +, Rock-shell boots +, Black warhammer +, Off-hand black warhammer +, Adamant longsword +, Adamant warhammer +, Poison ivy seed +, Belladonna seed +, Guam seed +, Marrentill seed +, Tarromin seed +, Harralander seed +, Toadflax seed +, Ranarr seed +, Irit seed +, Avantoe seed +, Snapdragon seed +, Cadantine seed +, Lantadyme seed +, Kwuarm seed +, Dwarf weed seed +, Torstol seed +, Grimy guam +, Grimy marrentill +, Grimy tarromin +, Grimy harralander +, Grimy ranarr +, Grimy irit +, Grimy avantoe +, Grimy kwuarm +, Grimy cadantine +, Grimy lantadyme +, Grimy dwarf weed +, Coins +, Raw lobster +, Raw bass +, Tinderbox +, Casket +, Rock-shell splinter +, Rock-shell chunk +, Rock-shell shard +, Clue scroll (medium) +, Starved ancient effigy + and Key token +
Drops item from RDTCoins +, Uncut sapphire +, Uncut emerald +, Uncut ruby +, Uncut diamond +, Loop half of a key +, Tooth half of a key +, Uncut dragonstone +, Dragon longsword +, Dragon spear +, Battlestaff +, Rune javelin +, Rune platebody +, Shield left half +, Dragon helm +, Rune arrowheads +, Onyx bolts +, Vecna skull +, Chaos talisman +, Nature talisman +, Water talisman +, Earth talisman +, Fire talisman +, Raw lobster +, Raw shark +, Big bones +, Dragon bones +, Coal +, Gold ore +, Adamantite ore +, Adamant bar +, Runite ore +, Rune bar +, Grimy torstol +, Grimy snapdragon +, Super restore (4) +, Prayer potion (4) +, Lantadyme seed +, Dwarf weed seed +, Magic seed +, Palm tree seed +, Flax +, Molten glass +, Soft clay +, Yew logs +, Teak plank +, Mahogany plank +, Brawling gloves (Melee) +, Brawling gloves (Magic) +, Brawling gloves (Ranged) +, Brawling gloves (Agility) +, Brawling gloves (Cooking) +, Brawling gloves (FM) +, Brawling gloves (Fishing) +, Brawling gloves (Hunter) +, Brawling gloves (Mining) +, Brawling gloves (Prayer) +, Brawling gloves (Smithing) +, Brawling gloves (Thieving) +, Brawling gloves (WC) +, Crystal triskelion fragment 1 +, Crystal triskelion fragment 2 + and Crystal triskelion fragment 3 +
Is members onlytrue
Release date1 August 2005 +

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