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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
BonesBones1Always156

Runes/TalismansEdit

Item Quantity Rarity GE price
Water runeWater rune1–39Common11–429
Earth runeEarth rune1–40Common10–400
Air talismanAir talisman1Uncommon218
Mind talismanMind talisman1Uncommon266
Fire talismanFire talisman1Uncommon1,608
Cosmic talismanCosmic talisman1Rare409
Body talismanBody talisman1Rare293
Water talismanWater talisman1Uncommon6,455
Earth talismanEarth talisman1Uncommon1,750
Nature talismanNature talisman1Rare933
Chaos talismanChaos talisman1Uncommon928

Weaponry/ArmourEdit

Item Quantity Rarity GE price
Steel platebodySteel platebody1Common2,317
Black clawBlack claw1Common[1]480
Off-hand black clawOff-hand black claw1Common[1]628
Black platebodyBlack platebody1Common1,901
Mithril hatchetMithril hatchet1Common1,123
Rock-shell glovesRock-shell gloves1Uncommon13,915
Rock-shell bootsRock-shell boots1Uncommon5,475
Black warhammerBlack warhammer1Uncommon981
Off-hand black warhammerOff-hand black warhammer1Uncommon380
Adamant longswordAdamant longsword1Uncommon4,506
Adamant warhammerAdamant warhammer1Rare3,040
  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 seed1Uncommon37
Belladonna seed 5Belladonna seed1Uncommon522
Guam seed 5Guam seed1Uncommon13
Marrentill seed 5Marrentill seed1Uncommon13
Tarromin seed 5Tarromin seed1Uncommon15
Harralander seed 5Harralander seed1Uncommon16
Toadflax seed 5Toadflax seed1Uncommon322
Ranarr seed 5Ranarr seed1Rare971
Irit seed 5Irit seed1Rare164
Avantoe seed 5Avantoe seed1Rare288
Snapdragon seed 5Snapdragon seed1Rare380
Cadantine seed 5Cadantine seed1Rare3,262
Lantadyme seed 5Lantadyme seed1Rare1,031
Kwuarm seed 5Kwuarm seed1Rare3,243
Dwarf weed seed 5Dwarf weed seed1Very rare1,079
Torstol seed 5Torstol seed1Very rare3,498

HerbsEdit

Item Quantity Rarity GE price
Grimy guamGrimy guam1Uncommon118
Grimy marrentillGrimy marrentill1Uncommon121
Grimy tarrominGrimy tarromin1Uncommon38
Grimy harralanderGrimy harralander1Uncommon99
Grimy ranarrGrimy ranarr1Rare2,303
Grimy iritGrimy irit1Rare2,003
Grimy avantoeGrimy avantoe1Rare2,518
Grimy kwuarmGrimy kwuarm1Rare4,560
Grimy cadantineGrimy cadantine1Rare4,336
Grimy lantadymeGrimy lantadyme1Rare3,419
Grimy dwarf weedGrimy dwarf weed1Rare3,620

OtherEdit

Item Quantity Rarity GE price
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common101
Raw bassRaw bass1Common262
TinderboxTinderbox1Common176
CasketCasket1Rare4,552
Rock-shell splinterRock-shell splinter1Uncommon11,207
Rock-shell chunkRock-shell chunk1Rare8,551
Rock-shell shardRock-shell shard1Rare8,894
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 sapphire1Common908
Uncut emeraldUncut emerald1Common1,593
Uncut rubyUncut ruby1Common2,892
Uncut diamondUncut diamond1Common3,526
Uncut diamondUncut diamond45–55 (noted)Rare158,670–193,930
Loop half of a keyLoop half of a key1Common14,571
Tooth half of a keyTooth half of a key1Common26,284
Uncut dragonstoneUncut dragonstone1Uncommon12,875
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare579,375–708,125
Dragon longswordDragon longsword1Common57,286
Dragon spearDragon spear1Rare35,704
BattlestaffBattlestaff180–220 (noted)Rare1,250,820–1,528,780
Rune javelinRune javelin5Rare955
Rune platebodyRune platebody1Uncommon37,656
Rune platebodyRune platebody15–25 (noted)Rare564,840–941,400
Shield left halfShield left half1Rare64,675
Dragon helmDragon helm1Uncommon58,832
Rune arrowheads 5Rune arrowheads113–137Common16,272–19,728
Onyx bolts 5Onyx bolts135–165Very rare1,087,020–1,328,580
Vecna skullVecna skull1Rare76,185
Chaos talismanChaos talisman1Rare928
Nature talismanNature talisman1Rare933
Water talismanWater talisman65–82 (noted)Rare419,575–529,310
Earth talismanEarth talisman65–82 (noted)Rare113,750–143,500
Fire talismanFire talisman25–35 (noted)Rare40,200–56,280
Raw lobsterRaw lobster135–165 (noted)Common13,635–16,665
Raw sharkRaw shark225–275 (noted)Uncommon199,575–243,925
Big bonesBig bones79–90 (noted)Uncommon27,018–30,780
Dragon bonesDragon bones180–220 (noted)Rare334,260–408,540
CoalCoal200–1,100 (noted)Uncommon41,200–226,600
Gold oreGold ore90–110 (noted)Common12,510–15,290
Adamantite oreAdamantite ore180–220 (noted)Uncommon163,080–199,320
Adamant barAdamant bar14–16 (noted)Common35,420–40,480
Adamant barAdamant bar135–165 (noted)Rare341,550–417,450
Runite oreRunite ore90–110 (noted)Rare918,450–1,122,550
Rune barRune bar(noted)Common41,373
Rune barRune bar45–55 (noted)Rare620,595–758,505
Grimy torstolGrimy torstol90–110 (noted)Uncommon372,420–455,180
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon278,100–339,900
Super restore (4)Super restore (4)45–55 (noted)Uncommon176,670–215,930
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon141,345–172,755
Lantadyme seed 5Lantadyme seed14–16Uncommon14,434–16,496
Dwarf weed seed 5Dwarf weed seed14–16Uncommon15,106–17,264
Magic seed 5Magic seed4Uncommon280,548
Palm tree seed 5Palm tree seed10Rare807,760
FlaxFlax450–550 (noted)Common7,650–9,350
Molten glassMolten glass45–55 (noted)Common12,465–15,235
Soft claySoft clay450–550 (noted)Uncommon163,350–199,650
Yew logsYew logs68–82Uncommon12,852–15,498
Yew logsYew logs675–825 (noted)Rare127,575–155,925
Teak plankTeak plank45–55 (noted)Uncommon27,090–33,110
Mahogany plankMahogany plank270–330 (noted)Rare549,990–672,210
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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