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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
BonesBones1Always177

Runes/TalismansEdit

Item Quantity Rarity GE price
Water runeWater rune1–39Common14–546
Earth runeEarth rune1–40Common13–520
Air talismanAir talisman1Uncommon328
Mind talismanMind talisman1Uncommon536
Fire talismanFire talisman1Uncommon1,603
Cosmic talismanCosmic talisman1Rare347
Body talismanBody talisman1Rare264
Water talismanWater talisman1Uncommon6,182
Earth talismanEarth talisman1Uncommon1,739
Nature talismanNature talisman1Rare1,187
Chaos talismanChaos talisman1Uncommon1,609

Weaponry/ArmourEdit

Item Quantity Rarity GE price
Steel platebodySteel platebody1Common2,110
Black clawBlack claw1Common[1]1,253
Off-hand black clawOff-hand black claw1Common[1]838
Black platebodyBlack platebody1Common1,904
Mithril hatchetMithril hatchet1Common1,229
Rock-shell glovesRock-shell gloves1Uncommon16,776
Rock-shell bootsRock-shell boots1Uncommon8,519
Black warhammerBlack warhammer1Uncommon1,274
Off-hand black warhammerOff-hand black warhammer1Uncommon398
Adamant longswordAdamant longsword1Uncommon3,616
Adamant warhammerAdamant warhammer1Rare2,683
  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 seed1Uncommon83
Belladonna seed 5Belladonna seed1Uncommon536
Guam seed 5Guam seed1Uncommon26
Marrentill seed 5Marrentill seed1Uncommon12
Tarromin seed 5Tarromin seed1Uncommon21
Harralander seed 5Harralander seed1Uncommon15
Toadflax seed 5Toadflax seed1Uncommon992
Ranarr seed 5Ranarr seed1Rare866
Irit seed 5Irit seed1Rare370
Avantoe seed 5Avantoe seed1Rare301
Snapdragon seed 5Snapdragon seed1Rare373
Cadantine seed 5Cadantine seed1Rare4,616
Lantadyme seed 5Lantadyme seed1Rare745
Kwuarm seed 5Kwuarm seed1Rare6,045
Dwarf weed seed 5Dwarf weed seed1Very rare694
Torstol seed 5Torstol seed1Very rare1,843

HerbsEdit

Item Quantity Rarity GE price
Grimy guamGrimy guam1Uncommon113
Grimy marrentillGrimy marrentill1Uncommon155
Grimy tarrominGrimy tarromin1Uncommon35
Grimy harralanderGrimy harralander1Uncommon89
Grimy ranarrGrimy ranarr1Rare2,634
Grimy iritGrimy irit1Rare3,104
Grimy avantoeGrimy avantoe1Rare2,629
Grimy kwuarmGrimy kwuarm1Rare5,255
Grimy cadantineGrimy cadantine1Rare4,856
Grimy lantadymeGrimy lantadyme1Rare3,463
Grimy dwarf weedGrimy dwarf weed1Rare3,283

OtherEdit

Item Quantity Rarity GE price
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common109
Raw bassRaw bass1Common215
TinderboxTinderbox1Common172
CasketCasket1Rare1,626
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 sapphire1Common987
Uncut emeraldUncut emerald1Common1,620
Uncut rubyUncut ruby1Common2,816
Uncut diamondUncut diamond1Common4,038
Uncut diamondUncut diamond45–55 (noted)Rare181,710–222,090
Loop half of a keyLoop half of a key1Common18,073
Tooth half of a keyTooth half of a key1Common25,072
Uncut dragonstoneUncut dragonstone1Uncommon12,649
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare569,205–695,695
Dragon longswordDragon longsword1Common57,277
Dragon spearDragon spear1Rare35,465
BattlestaffBattlestaff180–220 (noted)Rare1,252,260–1,530,540
Rune javelinRune javelin5Rare905
Rune platebodyRune platebody1Uncommon37,851
Rune platebodyRune platebody15–25 (noted)Rare567,765–946,275
Shield left halfShield left half1Rare64,170
Dragon helmDragon helm1Uncommon58,771
Rune arrowheads 5Rune arrowheads113–137Common22,939–27,811
Onyx bolts 5Onyx bolts135–165Very rare1,044,630–1,276,770
Vecna skullVecna skull1Very rare79,660
Chaos talismanChaos talisman1Rare1,609
Nature talismanNature talisman1Rare1,187
Water talismanWater talisman65–82 (noted)Rare401,830–506,924
Earth talismanEarth talisman65–82 (noted)Rare113,035–142,598
Fire talismanFire talisman25–35 (noted)Rare40,075–56,105
Raw lobsterRaw lobster135–165 (noted)Common14,715–17,985
Raw sharkRaw shark225–275 (noted)Uncommon227,700–278,300
Big bonesBig bones72–90 (noted)Uncommon24,912–31,140
Dragon bonesDragon bones180–220 (noted)Rare290,520–355,080
CoalCoal200–1,100 (noted)Uncommon40,600–223,300
Gold oreGold ore90–110 (noted)Common13,500–16,500
Adamantite oreAdamantite ore180–220 (noted)Uncommon314,280–384,120
Adamant barAdamant bar14–16 (noted)Common32,732–37,408
Adamant barAdamant bar135–165 (noted)Rare315,630–385,770
Runite oreRunite ore90–110 (noted)Rare1,007,910–1,231,890
Rune barRune bar(noted)Common42,111
Rune barRune bar45–55 (noted)Rare631,665–772,035
Grimy torstolGrimy torstol90–110 (noted)Uncommon391,680–478,720
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon386,190–472,010
Super restore (4)Super restore (4)45–55 (noted)Uncommon241,245–294,855
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon167,310–204,490
Lantadyme seed 5Lantadyme seed14–16Uncommon10,430–11,920
Dwarf weed seed 5Dwarf weed seed14–16Uncommon9,716–11,104
Magic seed 5Magic seed4Uncommon440,516
Palm tree seed 5Palm tree seed10Rare1,849,420
FlaxFlax450–550 (noted)Common4,500–5,500
Molten glassMolten glass45–55 (noted)Common7,740–9,460
Soft claySoft clay450–550 (noted)Uncommon170,550–208,450
Yew logsYew logs68–82Uncommon13,600–16,400
Yew logsYew logs675–825 (noted)Rare135,000–165,000
Teak plankTeak plank45–55 (noted)Uncommon33,210–40,590
Mahogany plankMahogany plank270–330 (noted)Rare580,770–709,830
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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