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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
BonesBones1Always191

Runes/TalismansEdit

Item Quantity Rarity GE price
Water runeWater rune1–39Common18–702
Earth runeEarth rune1–40Common15–600
Air talismanAir talisman1Uncommon193
Mind talismanMind talisman1Uncommon336
Fire talismanFire talisman1Uncommon2,300
Cosmic talismanCosmic talisman1Rare383
Body talismanBody talisman1Rare334
Water talismanWater talisman1Uncommon7,670
Earth talismanEarth talisman1Uncommon2,243
Nature talismanNature talisman1Rare797
Chaos talismanChaos talisman1Uncommon1,323

Weaponry/ArmourEdit

Item Quantity Rarity GE price
Steel platebodySteel platebody1Common3,012
Black clawBlack claw1Common[1]820
Off-hand black clawOff-hand black claw1Common[1]744
Black platebodyBlack platebody1Common2,160
Mithril hatchetMithril hatchet1Common1,237
Rock-shell glovesRock-shell gloves1Uncommon12,432
Rock-shell bootsRock-shell boots1Uncommon6,442
Black warhammerBlack warhammer1Uncommon1,180
Off-hand black warhammerOff-hand black warhammer1Uncommon403
Adamant longswordAdamant longsword1Uncommon4,654
Adamant warhammerAdamant warhammer1Rare2,904
  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
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SeedsEdit

Item Quantity Rarity GE price
Poison ivy seed 5Poison ivy seed1Uncommon65
Belladonna seed 5Belladonna seed1Uncommon365
Guam seed 5Guam seed1Uncommon12
Marrentill seed 5Marrentill seed1Uncommon12
Tarromin seed 5Tarromin seed1Uncommon21
Harralander seed 5Harralander seed1Uncommon16
Toadflax seed 5Toadflax seed1Uncommon653
Ranarr seed 5Ranarr seed1Rare998
Irit seed 5Irit seed1Rare319
Avantoe seed 5Avantoe seed1Rare300
Snapdragon seed 5Snapdragon seed1Rare434
Cadantine seed 5Cadantine seed1Rare8,021
Lantadyme seed 5Lantadyme seed1Rare1,086
Kwuarm seed 5Kwuarm seed1Rare5,667
Dwarf weed seed 5Dwarf weed seed1Very rare942
Torstol seed 5Torstol seed1Very rare3,042

HerbsEdit

Item Quantity Rarity GE price
Grimy guamGrimy guam1Uncommon100
Grimy marrentillGrimy marrentill1Uncommon127
Grimy tarrominGrimy tarromin1Uncommon34
Grimy harralanderGrimy harralander1Uncommon80
Grimy ranarrGrimy ranarr1Rare2,803
Grimy iritGrimy irit1Rare3,765
Grimy avantoeGrimy avantoe1Rare3,306
Grimy kwuarmGrimy kwuarm1Rare6,168
Grimy cadantineGrimy cadantine1Rare6,079
Grimy lantadymeGrimy lantadyme1Rare4,338
Grimy dwarf weedGrimy dwarf weed1Rare4,136

OtherEdit

Item Quantity Rarity GE price
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common103
Raw bassRaw bass1Common289
TinderboxTinderbox1Common161
CasketCasket1Rare2,595
Rock-shell splinterRock-shell splinter1Uncommon11,238
Rock-shell chunkRock-shell chunk1Rare8,850
Rock-shell shardRock-shell shard1Rare8,135
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 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 sapphire1Common1,115
Uncut emeraldUncut emerald1Common2,099
Uncut rubyUncut ruby1Common3,738
Uncut diamondUncut diamond1Common5,335
Uncut diamondUncut diamond45–55 (noted)Rare240,075–293,425
Loop half of a keyLoop half of a key1Common17,515
Tooth half of a keyTooth half of a key1Common28,239
Uncut dragonstoneUncut dragonstone1Uncommon13,675
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare615,375–752,125
Dragon longswordDragon longsword1Common56,864
Dragon spearDragon spear1Rare35,147
BattlestaffBattlestaff180–220 (noted)Rare1,249,020–1,526,580
Rune javelinRune javelin5Rare995
Rune platebodyRune platebody1Uncommon37,317
Rune platebodyRune platebody15–25 (noted)Rare559,755–932,925
Shield left halfShield left half1Rare63,833
Dragon helmDragon helm1Uncommon57,722
Rune arrowheads 5Rune arrowheads113–137Common21,244–25,756
Onyx bolts 5Onyx bolts135–165Very rare1,066,905–1,303,995
Vecna skullVecna skull1Rare75,597
Chaos talismanChaos talisman1Rare1,323
Nature talismanNature talisman1Rare797
Water talismanWater talisman65–82 (noted)Rare498,550–628,940
Earth talismanEarth talisman65–82 (noted)Rare145,795–183,926
Fire talismanFire talisman25–35 (noted)Rare57,500–80,500
Raw lobsterRaw lobster135–165 (noted)Common13,905–16,995
Raw sharkRaw shark225–275 (noted)Uncommon240,975–294,525
Big bonesBig bones76–90 (noted)Uncommon25,840–30,600
Dragon bonesDragon bones180–220 (noted)Rare333,900–408,100
CoalCoal200–1,100 (noted)Uncommon36,200–199,100
Gold oreGold ore90–110 (noted)Common12,960–15,840
Adamantite oreAdamantite ore180–220 (noted)Uncommon189,180–231,220
Adamant barAdamant bar14–16 (noted)Common40,810–46,640
Adamant barAdamant bar135–165 (noted)Rare393,525–480,975
Runite oreRunite ore90–110 (noted)Rare1,014,480–1,239,920
Rune barRune bar(noted)Common42,165
Rune barRune bar45–55 (noted)Rare632,475–773,025
Grimy torstolGrimy torstol90–110 (noted)Uncommon491,760–601,040
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon341,910–417,890
Super restore (4)Super restore (4)45–55 (noted)Uncommon233,730–285,670
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon149,220–182,380
Lantadyme seed 5Lantadyme seed14–16Uncommon15,204–17,376
Dwarf weed seed 5Dwarf weed seed14–16Uncommon13,188–15,072
Magic seed 5Magic seed4Uncommon313,812
Palm tree seed 5Palm tree seed10Rare1,276,670
FlaxFlax450–550 (noted)Common4,950–6,050
Molten glassMolten glass45–55 (noted)Common13,545–16,555
Soft claySoft clay450–550 (noted)Uncommon171,900–210,100
Yew logsYew logs68–82Uncommon12,852–15,498
Yew logsYew logs675–825 (noted)Rare127,575–155,925
Teak plankTeak plank45–55 (noted)Uncommon42,840–52,360
Mahogany plankMahogany plank270–330 (noted)Rare648,810–792,990
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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