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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
BonesBones1Always187

Runes/TalismansEdit

Item Quantity Rarity GE market price
Water runeWater rune1–39Common15–585
Earth runeEarth rune2–37Common24–444
Air talismanAir talisman1Uncommon159
Mind talismanMind talisman1Uncommon208
Fire talismanFire talisman1Uncommon2,920
Cosmic talismanCosmic talisman1Rare493
Body talismanBody talisman1Rare154
Water talismanWater talisman1Uncommon12,282
Earth talismanEarth talisman1Uncommon3,154
Nature talismanNature talisman1Rare210
Chaos talismanChaos talisman1Uncommon630

Weaponry/ArmourEdit

Item Quantity Rarity GE market price
Steel platebodySteel platebody1Common2,040
Black clawBlack claw1Uncommon [1]230
Off-hand black clawOff-hand black claw1Uncommon [1]758
Black platebodyBlack platebody1Common1,845
Mithril hatchetMithril hatchet1Uncommon120
Rock-shell glovesRock-shell gloves1Uncommon31,451
Rock-shell bootsRock-shell boots1Uncommon13,692
Black warhammerBlack warhammer1Uncommon679
Off-hand black warhammerOff-hand black warhammer1Uncommon312
Adamant longswordAdamant longsword1Uncommon1,374
Adamant warhammerAdamant warhammer1Rare2,608
  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 seed1Uncommon11
Belladonna seed 5Belladonna seed1Uncommon104
Herb seed 5Guam seed1Uncommon7
Herb seed 5Marrentill seed1Uncommon9
Herb seed 5Tarromin seed1Uncommon12
Herb seed 5Harralander seed1Uncommon9
Herb seed 5Toadflax seed1Rare1,025
Herb seed 5Ranarr seed1Rare796
Herb seed 5Irit seed1Rare106
Herb seed 5Avantoe seed1Rare435
Herb seed 5Snapdragon seed1Rare514
Herb seed 5Cadantine seed1Rare462
Herb seed 5Lantadyme seed1Rare9,786
Herb seed 5Dwarf weed seed1Very rare15,624
Herb seed 5Torstol seed1Very rare8,505

HerbsEdit

Item Quantity Rarity GE market price
Grimy guamGrimy guam1Uncommon339
Grimy marrentillGrimy marrentill1Uncommon175
Grimy tarrominGrimy tarromin1Uncommon33
Grimy harralanderGrimy harralander1Uncommon95
Grimy ranarrGrimy ranarr1Rare2,299
Grimy iritGrimy irit1Rare2,172
Grimy avantoeGrimy avantoe1Rare4,023
Grimy kwuarmGrimy kwuarm1Rare4,903
Grimy cadantineGrimy cadantine1Rare3,763
Grimy lantadymeGrimy lantadyme1Rare5,898
Grimy dwarf weedGrimy dwarf weed1Rare6,334

OtherEdit

Item Quantity Rarity GE market price
Coins 100Coins27; 28; 42; 70; 137CommonNot sold
Raw lobsterRaw lobster1Common256
Raw bassRaw bass1Common365
TinderboxTinderbox1Common213
CasketCasket1Rare2,538
Rock-shell splinterRock-shell splinter1Uncommon13,805
Rock-shell chunkRock-shell chunk1Rare8,385
Rock-shell shardRock-shell shard1Rare6,860
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 sapphire1Common750
Uncut emeraldUncut emerald1Common1,424
Uncut rubyUncut ruby1Common2,187
Uncut diamondUncut diamond1Common3,724
Uncut diamondUncut diamond45–55 (noted)Rare167,580–204,820
Loop half of a keyLoop half of a key1Uncommon17,890
Tooth half of a keyTooth half of a key1Uncommon40,714
Uncut dragonstoneUncut dragonstone1Uncommon12,768
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare574,560–702,240
Dragon longswordDragon longsword1Common58,147
Dragon spearDragon spear1Uncommon36,538
BattlestaffBattlestaff180–220 (noted)Uncommon1,288,080–1,574,320
Rune javelinRune javelin5Rare915
Rune platebodyRune platebody1Uncommon38,010
Rune platebodyRune platebody15–25 (noted)Rare570,150–950,250
Shield left halfShield left half1Uncommon65,239
Dragon helmDragon helm1Uncommon58,973
Rune arrowheads 5Rune arrowheads113–137Common25,877–31,373
Onyx bolts 5Onyx bolts135–165Rare1,146,150–1,400,850
Vecna skullVecna skull1Uncommon41,880
Chaos talismanChaos talisman1Uncommon630
Nature talismanNature talisman1Uncommon210
Water talismanWater talisman65–82 (noted)Rare798,330–1,007,124
Earth talismanEarth talisman65–82 (noted)Rare205,010–258,628
Fire talismanFire talisman25–35 (noted)Rare73,000–102,200
Raw lobsterRaw lobster135–165 (noted)Uncommon34,560–42,240
Raw sharkRaw shark225–275 (noted)Uncommon169,425–207,075
Big bonesBig bones80–90 (noted)Uncommon32,720–36,810
Dragon bonesDragon bones180–220 (noted)Uncommon344,340–420,860
CoalCoal200–1,100 (noted)Uncommon62,800–345,400
Gold oreGold ore90–110 (noted)Common16,110–19,690
Adamantite oreAdamantite ore180–220 (noted)Uncommon252,180–308,220
Adamant barAdamant bar15 (noted)Common47,250
Adamant barAdamant bar135–165 (noted)Rare425,250–519,750
Runite oreRunite ore90–110 (noted)Rare994,770–1,215,830
Rune barRune bar3 (noted)Common43,380
Rune barRune bar45–55 (noted)Rare650,700–795,300
Grimy torstolGrimy torstol90–110 (noted)Uncommon481,860–588,940
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon329,760–403,040
Super restore (4)Super restore (4)45–55 (noted)Uncommon156,420–191,180
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon131,490–160,710
Herb seed 5Lantadyme seed14–16Uncommon137,004–156,576
Herb seed 5Dwarf weed seed14–16Uncommon218,736–249,984
Magic seed 5Magic seed4Uncommon593,528
Palm tree seed 5Palm tree seed10Rare1,744,160
FlaxFlax450–550 (noted)Common15,300–18,700
Molten glassMolten glass45–55 (noted)Common8,100–9,900
Soft claySoft clay450–550 (noted)Uncommon86,850–106,150
Yew logsYew logs68–82Uncommon18,224–21,976
Yew logsYew logs675–825 (noted)Rare180,900–221,100
Teak plankTeak plank45–55 (noted)Uncommon32,490–39,710
Mahogany plankMahogany plank270–330 (noted)Rare572,400–699,600
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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