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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 players to the Abyss. This is labelled entrance number 2 and goes directly to the giant rock crabs.

StrategyEdit

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.

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 price
BonesBones1Always189

Runes/TalismansEdit

Item Quantity Rarity GE price
Water runeWater rune1–39Common14–546
Earth runeEarth rune1–40Common13–520
Air talismanAir talisman1Uncommon317
Mind talismanMind talisman1Uncommon573
Fire talismanFire talisman1Uncommon1,566
Cosmic talismanCosmic talisman1Rare344
Body talismanBody talisman1Rare254
Water talismanWater talisman1Uncommon6,225
Earth talismanEarth talisman1Uncommon1,741
Nature talismanNature talisman1Rare1,191
Chaos talismanChaos talisman1Uncommon1,619

Weaponry/ArmourEdit

Item Quantity Rarity GE price
Steel platebodySteel platebody1Common2,130
Black clawBlack claw1Common[1]1,202
Off-hand black clawOff-hand black claw1Common[1]838
Black platebodyBlack platebody1Common1,848
Mithril hatchetMithril hatchet1Common1,193
Rock-shell glovesRock-shell gloves1Uncommon16,776
Rock-shell bootsRock-shell boots1Uncommon8,519
Black warhammerBlack warhammer1Uncommon1,306
Off-hand black warhammerOff-hand black warhammer1Uncommon398
Adamant longswordAdamant longsword1Uncommon3,515
Adamant warhammerAdamant warhammer1Rare2,692
  1. ^ a b Main hand and off hand claws are dropped together.

CharmsEdit

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 6,143 kills.
3 charms are dropped at a time.
Add data to the log
(Requires JavaScript to be enabled)

SeedsEdit

Item Quantity Rarity GE price
Poison ivy seed 5Poison ivy seed1Uncommon85
Belladonna seed 5Belladonna seed1Uncommon517
Guam seed 5Guam seed1Uncommon24
Marrentill seed 5Marrentill seed1Uncommon12
Tarromin seed 5Tarromin seed1Uncommon20
Harralander seed 5Harralander seed1Uncommon16
Toadflax seed 5Toadflax seed1Uncommon985
Ranarr seed 5Ranarr seed1Rare855
Irit seed 5Irit seed1Rare377
Avantoe seed 5Avantoe seed1Rare299
Snapdragon seed 5Snapdragon seed1Rare364
Cadantine seed 5Cadantine seed1Rare5,446
Lantadyme seed 5Lantadyme seed1Rare731
Kwuarm seed 5Kwuarm seed1Rare6,333
Dwarf weed seed 5Dwarf weed seed1Very rare635
Torstol seed 5Torstol seed1Very rare1,787

HerbsEdit

Item Quantity Rarity GE price
Grimy guamGrimy guam1Uncommon104
Grimy marrentillGrimy marrentill1Uncommon138
Grimy tarrominGrimy tarromin1Uncommon37
Grimy harralanderGrimy harralander1Uncommon83
Grimy ranarrGrimy ranarr1Rare2,469
Grimy iritGrimy irit1Rare3,004
Grimy avantoeGrimy avantoe1Rare2,680
Grimy kwuarmGrimy kwuarm1Rare5,472
Grimy cadantineGrimy cadantine1Rare4,771
Grimy lantadymeGrimy lantadyme1Rare3,533
Grimy dwarf weedGrimy dwarf weed1Rare3,296

OtherEdit

Item Quantity Rarity GE price
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common109
Raw bassRaw bass1Common215
TinderboxTinderbox1Common175
CasketCasket1Rare1,614
Rock-shell splinterRock-shell splinter1Uncommon11,281
Rock-shell chunkRock-shell chunk1Rare7,919
Rock-shell shardRock-shell shard1Rare8,156
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 sapphire1Common919
Uncut emeraldUncut emerald1Common1,575
Uncut rubyUncut ruby1Common2,741
Uncut diamondUncut diamond1Common3,967
Uncut diamondUncut diamond45–55 (noted)Rare178,515–218,185
Loop half of a keyLoop half of a key1Common17,376
Tooth half of a keyTooth half of a key1Common24,187
Uncut dragonstoneUncut dragonstone1Uncommon12,496
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare562,320–687,280
Dragon longswordDragon longsword1Common56,738
Dragon spearDragon spear1Rare35,596
BattlestaffBattlestaff180–220 (noted)Rare1,251,000–1,529,000
Rune javelinRune javelin5Rare910
Rune platebodyRune platebody1Uncommon37,734
Rune platebodyRune platebody15–25 (noted)Rare566,010–943,350
Shield left halfShield left half1Rare64,216
Dragon helmDragon helm1Uncommon58,434
Rune arrowheads 5Rune arrowheads113–137Common21,470–26,030
Onyx bolts 5Onyx bolts135–165Very rare1,043,415–1,275,285
Vecna skullVecna skull1Very rare77,794
Chaos talismanChaos talisman1Rare1,619
Nature talismanNature talisman1Rare1,191
Water talismanWater talisman65–82 (noted)Rare404,625–510,450
Earth talismanEarth talisman65–82 (noted)Rare113,165–142,762
Fire talismanFire talisman25–35 (noted)Rare39,150–54,810
Raw lobsterRaw lobster135–165 (noted)Common14,715–17,985
Raw sharkRaw shark225–275 (noted)Uncommon229,275–280,225
Big bonesBig bones72–90 (noted)Uncommon25,344–31,680
Dragon bonesDragon bones180–220 (noted)Rare292,500–357,500
CoalCoal200–1,100 (noted)Uncommon44,800–246,400
Gold oreGold ore90–110 (noted)Common13,050–15,950
Adamantite oreAdamantite ore180–220 (noted)Uncommon280,800–343,200
Adamant barAdamant bar14–16 (noted)Common33,278–38,032
Adamant barAdamant bar135–165 (noted)Rare320,895–392,205
Runite oreRunite ore90–110 (noted)Rare1,005,300–1,228,700
Rune barRune bar(noted)Common42,324
Rune barRune bar45–55 (noted)Rare634,860–775,940
Grimy torstolGrimy torstol90–110 (noted)Uncommon387,450–473,550
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon367,290–448,910
Super restore (4)Super restore (4)45–55 (noted)Uncommon232,920–284,680
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon166,050–202,950
Lantadyme seed 5Lantadyme seed14–16Uncommon10,234–11,696
Dwarf weed seed 5Dwarf weed seed14–16Uncommon8,890–10,160
Magic seed 5Magic seed4Uncommon433,144
Palm tree seed 5Palm tree seed10Rare1,793,180
FlaxFlax450–550 (noted)Common4,500–5,500
Molten glassMolten glass45–55 (noted)Common7,920–9,680
Soft claySoft clay450–550 (noted)Uncommon165,150–201,850
Yew logsYew logs68–82Uncommon13,328–16,072
Yew logsYew logs675–825 (noted)Rare132,300–161,700
Teak plankTeak plank45–55 (noted)Uncommon34,065–41,635
Mahogany plankMahogany plank270–330 (noted)Rare573,750–701,250
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

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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