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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
BonesBones1Always206

Runes/TalismansEdit

Item Quantity Rarity GE market price
Water runeWater rune1–39Common17–663
Earth runeEarth rune2–37Common24–444
Air talismanAir talisman1Uncommon168
Mind talismanMind talisman1Uncommon251
Fire talismanFire talisman1Uncommon2,772
Cosmic talismanCosmic talisman1Rare405
Body talismanBody talisman1Rare153
Water talismanWater talisman1Uncommon11,523
Earth talismanEarth talisman1Uncommon2,763
Nature talismanNature talisman1Rare203
Chaos talismanChaos talisman1Uncommon897

Weaponry/ArmourEdit

Item Quantity Rarity GE market price
Steel platebodySteel platebody1Common1,974
Black clawBlack claw1Uncommon [1]223
Off-hand black clawOff-hand black claw1Uncommon [1]731
Black platebodyBlack platebody1Common1,930
Mithril hatchetMithril hatchet1Uncommon127
Rock-shell glovesRock-shell gloves1Uncommon39,014
Rock-shell bootsRock-shell boots1Uncommon17,679
Black warhammerBlack warhammer1Uncommon702
Off-hand black warhammerOff-hand black warhammer1Uncommon317
Adamant longswordAdamant longsword1Uncommon1,361
Adamant warhammerAdamant warhammer1Rare2,619
  1. ^ a b Main hand and off hand claws are dropped together.

CharmsEdit

Charm drop numbers
No charmGold charmGreen charmCrimson charmBlue charm
0.7–1.1%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.
Please add to the log.
(Only if 50 or more creatures are killed)

SeedsEdit

Item Quantity Rarity GE market price
Poison ivy seed 5Poison ivy seed1Uncommon14
Belladonna seed 5Belladonna seed1Uncommon120
Herb seed 5Guam seed1Uncommon8
Herb seed 5Marrentill seed1Uncommon10
Herb seed 5Tarromin seed1Uncommon19
Herb seed 5Harralander seed1Uncommon7
Herb seed 5Toadflax seed1Rare1,512
Herb seed 5Ranarr seed1Rare889
Herb seed 5Irit seed1Rare81
Herb seed 5Avantoe seed1Rare335
Herb seed 5Snapdragon seed1Rare424
Herb seed 5Cadantine seed1Rare448
Herb seed 5Lantadyme seed1Rare9,739
Herb seed 5Dwarf weed seed1Very rare13,516
Herb seed 5Torstol seed1Very rare8,170

HerbsEdit

Item Quantity Rarity GE market price
Grimy guamGrimy guam1Uncommon332
Grimy marrentillGrimy marrentill1Uncommon162
Grimy tarrominGrimy tarromin1Uncommon35
Grimy harralanderGrimy harralander1Uncommon83
Grimy ranarrGrimy ranarr1Rare2,395
Grimy iritGrimy irit1Rare2,063
Grimy avantoeGrimy avantoe1Rare4,128
Grimy kwuarmGrimy kwuarm1Rare4,688
Grimy cadantineGrimy cadantine1Rare3,391
Grimy lantadymeGrimy lantadyme1Rare6,216
Grimy dwarf weedGrimy dwarf weed1Rare6,600

OtherEdit

Item Quantity Rarity GE market price
Coins 100Coins27; 28; 42; 70; 137CommonNot sold
Raw lobsterRaw lobster1Common185
Raw bassRaw bass1Common402
TinderboxTinderbox1Common184
CasketCasket1Rare3,384
Rock-shell splinterRock-shell splinter1Uncommon13,260
Rock-shell chunkRock-shell chunk1Rare9,139
Rock-shell shardRock-shell shard1Rare6,995
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 sapphire1Common729
Uncut emeraldUncut emerald1Common1,381
Uncut rubyUncut ruby1Common2,270
Uncut diamondUncut diamond1Common4,028
Uncut diamondUncut diamond45–55 (noted)Rare181,260–221,540
Loop half of a keyLoop half of a key1Uncommon18,126
Tooth half of a keyTooth half of a key1Uncommon36,201
Uncut dragonstoneUncut dragonstone1Uncommon12,202
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare549,090–671,110
Dragon longswordDragon longsword1Common58,053
Dragon spearDragon spear1Uncommon36,306
BattlestaffBattlestaff180–220 (noted)Uncommon1,294,380–1,582,020
Rune javelinRune javelin5Rare910
Rune platebodyRune platebody1Uncommon38,218
Rune platebodyRune platebody15–25 (noted)Rare573,270–955,450
Shield left halfShield left half1Uncommon64,539
Dragon helmDragon helm1Uncommon59,182
Rune arrowheads 5Rune arrowheads113–137Common24,182–29,318
Onyx bolts 5Onyx bolts135–165Rare1,150,470–1,406,130
Vecna skullVecna skull1Uncommon40,008
Chaos talismanChaos talisman1Uncommon897
Nature talismanNature talisman1Uncommon203
Water talismanWater talisman65–82 (noted)Rare748,995–944,886
Earth talismanEarth talisman65–82 (noted)Rare179,595–226,566
Fire talismanFire talisman25–35 (noted)Rare69,300–97,020
Raw lobsterRaw lobster135–165 (noted)Uncommon24,975–30,525
Raw sharkRaw shark225–275 (noted)Uncommon183,375–224,125
Big bonesBig bones80–90 (noted)Uncommon31,760–35,730
Dragon bonesDragon bones180–220 (noted)Uncommon371,340–453,860
CoalCoal200–1,100 (noted)Uncommon69,000–379,500
Gold oreGold ore90–110 (noted)Common15,750–19,250
Adamantite oreAdamantite ore180–220 (noted)Uncommon244,440–298,760
Adamant barAdamant bar15 (noted)Common41,775
Adamant barAdamant bar135–165 (noted)Rare375,975–459,525
Runite oreRunite ore90–110 (noted)Rare955,800–1,168,200
Rune barRune bar3 (noted)Common42,822
Rune barRune bar45–55 (noted)Rare642,330–785,070
Grimy torstolGrimy torstol90–110 (noted)Uncommon449,280–549,120
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon313,470–383,130
Super restore (4)Super restore (4)45–55 (noted)Uncommon133,290–162,910
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon115,965–141,735
Herb seed 5Lantadyme seed14–16Uncommon136,346–155,824
Herb seed 5Dwarf weed seed14–16Uncommon189,224–216,256
Magic seed 5Magic seed4Uncommon566,548
Palm tree seed 5Palm tree seed10Rare1,510,300
FlaxFlax450–550 (noted)Common13,050–15,950
Molten glassMolten glass45–55 (noted)Common6,300–7,700
Soft claySoft clay450–550 (noted)Uncommon95,400–116,600
Yew logsYew logs68–82Uncommon18,904–22,796
Yew logsYew logs675–825 (noted)Rare187,650–229,350
Teak plankTeak plank45–55 (noted)Uncommon32,940–40,260
Mahogany plankMahogany plank270–330 (noted)Rare600,480–733,920
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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