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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
BonesBones1Always195

Runes/TalismansEdit

Item Quantity Rarity GE market price
Water runeWater rune1–39Common18–702
Earth runeEarth rune2–37Common24–444
Air talismanAir talisman1Uncommon146
Mind talismanMind talisman1Uncommon175
Fire talismanFire talisman1Uncommon2,845
Cosmic talismanCosmic talisman1Rare494
Body talismanBody talisman1Rare210
Water talismanWater talisman1Uncommon11,157
Earth talismanEarth talisman1Uncommon2,682
Nature talismanNature talisman1Rare231
Chaos talismanChaos talisman1Uncommon632

Weaponry/ArmourEdit

Item Quantity Rarity GE market price
Steel platebodySteel platebody1Common1,761
Black clawBlack claw1Uncommon [1]241
Off-hand black clawOff-hand black claw1Uncommon [1]854
Black platebodyBlack platebody1Common1,930
Mithril hatchetMithril hatchet1Uncommon108
Rock-shell glovesRock-shell gloves1Uncommon19,350
Rock-shell bootsRock-shell boots1Uncommon4,969
Black warhammerBlack warhammer1Uncommon565
Off-hand black warhammerOff-hand black warhammer1Uncommon296
Adamant longswordAdamant longsword1Uncommon1,235
Adamant warhammerAdamant warhammer1Rare2,378
  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 seed1Uncommon12
Belladonna seed 5Belladonna seed1Uncommon97
Herb seed 5Guam seed1Uncommon8
Herb seed 5Marrentill seed1Uncommon5
Herb seed 5Tarromin seed1Uncommon7
Herb seed 5Harralander seed1Uncommon8
Herb seed 5Toadflax seed1Rare746
Herb seed 5Ranarr seed1Rare983
Herb seed 5Irit seed1Rare185
Herb seed 5Avantoe seed1Rare689
Herb seed 5Snapdragon seed1Rare1,045
Herb seed 5Cadantine seed1Rare610
Herb seed 5Lantadyme seed1Rare16,780
Herb seed 5Dwarf weed seed1Very rare21,617
Herb seed 5Torstol seed1Very rare11,593

HerbsEdit

Item Quantity Rarity GE market price
Grimy guamGrimy guam1Uncommon419
Grimy marrentillGrimy marrentill1Uncommon196
Grimy tarrominGrimy tarromin1Uncommon27
Grimy harralanderGrimy harralander1Uncommon102
Grimy ranarrGrimy ranarr1Rare2,839
Grimy iritGrimy irit1Rare2,396
Grimy avantoeGrimy avantoe1Rare4,279
Grimy kwuarmGrimy kwuarm1Rare3,973
Grimy cadantineGrimy cadantine1Rare3,053
Grimy lantadymeGrimy lantadyme1Rare6,311
Grimy dwarf weedGrimy dwarf weed1Rare6,726

OtherEdit

Item Quantity Rarity GE market price
Coins 100Coins27; 28; 42; 70; 137CommonNot sold
Raw lobsterRaw lobster1Common217
Raw bassRaw bass1Common556
TinderboxTinderbox1Common195
CasketCasket1Rare2,946
Rock-shell splinterRock-shell splinter1Uncommon13,110
Rock-shell chunkRock-shell chunk1Rare7,574
Rock-shell shardRock-shell shard1Rare6,245
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 sapphire1Common954
Uncut emeraldUncut emerald1Common1,832
Uncut rubyUncut ruby1Common2,535
Uncut diamondUncut diamond1Common4,088
Uncut diamondUncut diamond45–55 (noted)Rare183,960–224,840
Loop half of a keyLoop half of a key1Uncommon18,864
Tooth half of a keyTooth half of a key1Uncommon39,311
Uncut dragonstoneUncut dragonstone1Uncommon12,046
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare542,070–662,530
Dragon longswordDragon longsword1Common57,948
Dragon spearDragon spear1Uncommon35,191
BattlestaffBattlestaff180–220 (noted)Uncommon1,279,080–1,563,320
Rune javelinRune javelin5Rare885
Rune platebodyRune platebody1Uncommon38,052
Rune platebodyRune platebody15–25 (noted)Rare570,780–951,300
Shield left halfShield left half1Uncommon64,268
Dragon helmDragon helm1Uncommon59,075
Rune arrowheads 5Rune arrowheads113–137Common19,436–23,564
Onyx bolts 5Onyx bolts135–165Rare1,127,115–1,377,585
Vecna skullVecna skull1Uncommon59,518
Chaos talismanChaos talisman1Uncommon632
Nature talismanNature talisman1Uncommon231
Water talismanWater talisman65–82 (noted)Rare725,205–914,874
Earth talismanEarth talisman65–82 (noted)Rare174,330–219,924
Fire talismanFire talisman25–35 (noted)Rare71,125–99,575
Raw lobsterRaw lobster135–165 (noted)Uncommon29,295–35,805
Raw sharkRaw shark225–275 (noted)Uncommon276,075–337,425
Big bonesBig bones80–90 (noted)Uncommon32,160–36,180
Dragon bonesDragon bones180–220 (noted)Uncommon510,120–623,480
CoalCoal200–1,100 (noted)Uncommon64,000–352,000
Gold oreGold ore90–110 (noted)Common17,460–21,340
Adamantite oreAdamantite ore180–220 (noted)Uncommon223,020–272,580
Adamant barAdamant bar15 (noted)Common42,690
Adamant barAdamant bar135–165 (noted)Rare384,210–469,590
Runite oreRunite ore90–110 (noted)Rare966,510–1,181,290
Rune barRune bar3 (noted)Common42,921
Rune barRune bar45–55 (noted)Rare643,815–786,885
Grimy torstolGrimy torstol90–110 (noted)Uncommon463,950–567,050
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon402,660–492,140
Super restore (4)Super restore (4)45–55 (noted)Uncommon200,160–244,640
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon138,825–169,675
Herb seed 5Lantadyme seed14–16Uncommon234,920–268,480
Herb seed 5Dwarf weed seed14–16Uncommon302,638–345,872
Magic seed 5Magic seed4Uncommon718,056
Palm tree seed 5Palm tree seed10Rare1,688,940
FlaxFlax450–550 (noted)Common18,000–22,000
Molten glassMolten glass45–55 (noted)Common10,305–12,595
Soft claySoft clay450–550 (noted)Uncommon102,600–125,400
Yew logsYew logs68–82Uncommon20,332–24,518
Yew logsYew logs675–825 (noted)Rare201,825–246,675
Teak plankTeak plank45–55 (noted)Uncommon34,020–41,580
Mahogany plankMahogany plank270–330 (noted)Rare548,640–670,560
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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