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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.

LocationsEdit

Chaos Tunnels entrances

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

StrategyEdit

Giant Rock Crabs are extremely resistant 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.

They are most vulnerable to fire-based spells.

RetreatEdit

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

DropsEdit

100%Edit

Item Quantity Rarity GE market price
BonesBones1Always119

Runes/TalismansEdit

Item Quantity Rarity GE market price
Water runeWater rune1–39Common19–741
Earth runeEarth rune2–37Common28–518
Air talismanAir talisman1Uncommon156
Mind talismanMind talisman1Uncommon286
Fire talismanFire talisman1Uncommon3,275
Cosmic talismanCosmic talisman1Rare389
Body talismanBody talisman1Rare179
Water talismanWater talisman1Uncommon12,397
Earth talismanEarth talisman1Uncommon3,597
Nature talismanNature talisman1Rare490
Chaos talismanChaos talisman1Uncommon888

Weaponry/ArmourEdit

Item Quantity Rarity GE market price
Steel platebodySteel platebody1Common2,281
Black clawBlack claw1Uncommon[1]201
Off-hand black clawOff-hand black claw1Uncommon[1]593
Black platebodyBlack platebody1Common1,522
Mithril hatchetMithril hatchet1Uncommon106
Rock-shell glovesRock-shell gloves1Uncommon42,337
Rock-shell bootsRock-shell boots1Uncommon16,115
Black warhammerBlack warhammer1Uncommon765
Off-hand black warhammerOff-hand black warhammer1Uncommon308
Adamant longswordAdamant longsword1Uncommon1,269
Adamant warhammerAdamant warhammer1Rare2,485
  1. ^ a b Main hand and off hand claws are dropped together.

CharmsEdit

Charm drop numbers
No charmGold charmGreen charmCrimson charmBlue charm
2–3%79–80%9–10%6–7%2%
Represents a 90% confidence range.
Based on a sample of 6,007 kills.
3 charms are dropped at a time.
Add data to the log
(Requires JavaScript to be enabled)

SeedsEdit

Item Quantity Rarity GE market price
Poison ivy seed 5Poison ivy seed1Uncommon25
Belladonna seed 5Belladonna seed1Uncommon250
Herb seed 5Guam seed1Uncommon4
Herb seed 5Marrentill seed1Uncommon25
Herb seed 5Tarromin seed1Uncommon39
Herb seed 5Harralander seed1Uncommon24
Herb seed 5Toadflax seed1Rare1,614
Herb seed 5Ranarr seed1Rare817
Herb seed 5Irit seed1Rare114
Herb seed 5Avantoe seed1Rare392
Herb seed 5Snapdragon seed1Rare409
Herb seed 5Cadantine seed1Rare1,396
Herb seed 5Lantadyme seed1Rare6,953
Herb seed 5Kwuarm seed1Rare1,671
Herb seed 5Dwarf weed seed1Very rare8,824
Herb seed 5Torstol seed1Very rare3,572

HerbsEdit

Item Quantity Rarity GE market price
Grimy guamGrimy guam1Uncommon340
Grimy marrentillGrimy marrentill1Uncommon208
Grimy tarrominGrimy tarromin1Uncommon40
Grimy harralanderGrimy harralander1Uncommon118
Grimy ranarrGrimy ranarr1Rare2,627
Grimy iritGrimy irit1Rare2,470
Grimy avantoeGrimy avantoe1Rare4,749
Grimy kwuarmGrimy kwuarm1Rare6,216
Grimy cadantineGrimy cadantine1Rare6,168
Grimy lantadymeGrimy lantadyme1Rare6,639
Grimy dwarf weedGrimy dwarf weed1Rare6,674

OtherEdit

Item Quantity Rarity GE market price
Coins 100Coins27; 28; 42; 70; 137CommonNot sold
Raw lobsterRaw lobster1Common199
Raw bassRaw bass1Common331
TinderboxTinderbox1Common181
CasketCasket1Rare4,720
Rock-shell splinterRock-shell splinter1Uncommon13,211
Rock-shell chunkRock-shell chunk1Rare8,502
Rock-shell shardRock-shell shard1Rare8,366
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.
The ring of wealth is not required to access the table.
Show/hide rare drop table
Item Quantity Rarity GE market price
Coins 1000Coins250–500; 3,000CommonNot sold
Uncut sapphireUncut sapphire1Common877
Uncut emeraldUncut emerald1Common1,483
Uncut rubyUncut ruby1Common2,499
Uncut diamondUncut diamond1Common4,425
Uncut diamondUncut diamond45–55 (noted)Rare199,125–243,375
Loop half of a keyLoop half of a key1Uncommon18,062
Tooth half of a keyTooth half of a key1Uncommon36,709
Uncut dragonstoneUncut dragonstone1Uncommon13,145
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare591,525–722,975
Dragon longswordDragon longsword1Common57,686
Dragon spearDragon spear1Uncommon35,904
BattlestaffBattlestaff180–220 (noted)Uncommon1,295,100–1,582,900
Rune javelinRune javelin5Rare915
Rune platebodyRune platebody1Uncommon37,888
Rune platebodyRune platebody15–25 (noted)Rare568,320–947,200
Shield left halfShield left half1Uncommon64,308
Dragon helmDragon helm1Uncommon59,056
Rune arrowheads 5Rune arrowheads113–137Common23,278–28,222
Onyx bolts 5Onyx bolts135–165Rare1,126,575–1,376,925
Vecna skullVecna skull1Uncommon40,006
Chaos talismanChaos talisman1Uncommon888
Nature talismanNature talisman1Uncommon490
Water talismanWater talisman65–82 (noted)Rare805,805–1,016,554
Earth talismanEarth talisman65–82 (noted)Rare233,805–294,954
Fire talismanFire talisman25–35 (noted)Rare81,875–114,625
Raw lobsterRaw lobster135–165 (noted)Uncommon26,865–32,835
Raw sharkRaw shark225–275 (noted)Uncommon205,200–250,800
Big bonesBig bones79–90 (noted)Uncommon28,282–32,220
Dragon bonesDragon bones180–220 (noted)Uncommon354,780–433,620
CoalCoal200–1,100 (noted)Uncommon72,600–399,300
Gold oreGold ore90–110 (noted)Common13,500–16,500
Adamantite oreAdamantite ore180–220 (noted)Uncommon236,880–289,520
Adamant barAdamant bar15 (noted)Common46,350
Adamant barAdamant bar135–165 (noted)Rare417,150–509,850
Runite oreRunite ore90–110 (noted)Rare910,080–1,112,320
Rune barRune bar3 (noted)Common42,060
Rune barRune bar45–55 (noted)Rare630,900–771,100
Grimy torstolGrimy torstol90–110 (noted)Uncommon491,670–600,930
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon376,290–459,910
Super restore (4)Super restore (4)45–55 (noted)Uncommon168,885–206,415
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon124,065–151,635
Herb seed 5Lantadyme seed14–16Uncommon97,342–111,248
Herb seed 5Dwarf weed seed14–16Uncommon123,536–141,184
Magic seed 5Magic seed4Uncommon414,124
Palm tree seed 5Palm tree seed10Rare1,532,710
FlaxFlax450–550 (noted)Common11,250–13,750
Molten glassMolten glass45–55 (noted)Common6,750–8,250
Soft claySoft clay450–550 (noted)Uncommon81,900–100,100
Yew logsYew logs68–82Uncommon15,640–18,860
Yew logsYew logs675–825 (noted)Rare155,250–189,750
Teak plankTeak plank45–55 (noted)Uncommon31,680–38,720
Mahogany plankMahogany plank270–330 (noted)Rare603,720–737,880
Brawling gloves (Melee)Brawling gloves (Melee)1RareNot sold
Brawling gloves (Magic)Brawling gloves (Magic)1RareNot sold
Brawling gloves (Ranged)Brawling gloves (Ranged)1RareNot sold
Brawling gloves (Agility)Brawling gloves (Agility)1RareNot sold
Brawling gloves (Cooking)Brawling gloves (Cooking)1RareNot sold
Brawling gloves (FM)Brawling gloves (FM)1RareNot sold
Brawling gloves (Fishing)Brawling gloves (Fishing)1RareNot sold
Brawling gloves (Hunter)Brawling gloves (Hunter)1RareNot sold
Brawling gloves (Mining)Brawling gloves (Mining)1RareNot sold
Brawling gloves (Prayer)Brawling gloves (Prayer)1RareNot sold
Brawling gloves (Smithing)Brawling gloves (Smithing)1RareNot sold
Brawling gloves (Thieving)Brawling gloves (Thieving)1RareNot sold
Brawling gloves (WC)Brawling gloves (WC)1RareNot 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 market price
Key tokenKey token1RareNot sold

TriviaEdit

  • 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.

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