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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
BonesBones1Always166

Runes/TalismansEdit

Item Quantity Rarity GE market price
Water runeWater rune1–39Common21–819
Earth runeEarth rune2–37Common30–555
Air talismanAir talisman1Uncommon185
Mind talismanMind talisman1Uncommon258
Fire talismanFire talisman1Uncommon4,257
Cosmic talismanCosmic talisman1Rare473
Body talismanBody talisman1Rare231
Water talismanWater talisman1Uncommon14,006
Earth talismanEarth talisman1Uncommon4,598
Nature talismanNature talisman1Rare294
Chaos talismanChaos talisman1Uncommon588

Weaponry/ArmourEdit

Item Quantity Rarity GE market price
Steel platebodySteel platebody1Common2,274
Black clawBlack claw1Uncommon [1]260
Off-hand black clawOff-hand black claw1Uncommon [1]924
Black platebodyBlack platebody1Common1,866
Mithril hatchetMithril hatchet1Uncommon100
Rock-shell glovesRock-shell gloves1Uncommon33,905
Rock-shell bootsRock-shell boots1Uncommon8,200
Black warhammerBlack warhammer1Uncommon541
Off-hand black warhammerOff-hand black warhammer1Uncommon307
Adamant longswordAdamant longsword1Uncommon1,325
Adamant warhammerAdamant warhammer1Rare2,544
  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 seed1Uncommon123
Herb seed 5Guam seed1Uncommon6
Herb seed 5Marrentill seed1Uncommon5
Herb seed 5Tarromin seed1Uncommon5
Herb seed 5Harralander seed1Uncommon7
Herb seed 5Toadflax seed1Rare518
Herb seed 5Ranarr seed1Rare1,066
Herb seed 5Irit seed1Rare100
Herb seed 5Avantoe seed1Rare1,056
Herb seed 5Snapdragon seed1Rare991
Herb seed 5Cadantine seed1Rare477
Herb seed 5Lantadyme seed1Rare17,767
Herb seed 5Dwarf weed seed1Very rare22,755
Herb seed 5Torstol seed1Very rare14,730

HerbsEdit

Item Quantity Rarity GE market price
Grimy guamGrimy guam1Uncommon433
Grimy marrentillGrimy marrentill1Uncommon188
Grimy tarrominGrimy tarromin1Uncommon27
Grimy harralanderGrimy harralander1Uncommon117
Grimy ranarrGrimy ranarr1Rare3,265
Grimy iritGrimy irit1Rare2,588
Grimy avantoeGrimy avantoe1Rare5,399
Grimy kwuarmGrimy kwuarm1Rare6,593
Grimy cadantineGrimy cadantine1Rare3,799
Grimy lantadymeGrimy lantadyme1Rare7,915
Grimy dwarf weedGrimy dwarf weed1Rare8,730

OtherEdit

Item Quantity Rarity GE market price
Coins 100Coins27; 28; 42; 70; 137CommonNot sold
Raw lobsterRaw lobster1Common350
Raw bassRaw bass1Common541
TinderboxTinderbox1Common250
CasketCasket1Rare2,769
Rock-shell splinterRock-shell splinter1Uncommon13,448
Rock-shell chunkRock-shell chunk1Rare7,040
Rock-shell shardRock-shell shard1Rare9,882
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 1000Coins50; 250–500; 3,000CommonNot sold
Uncut sapphireUncut sapphire1Common1,194
Uncut emeraldUncut emerald1Common2,138
Uncut rubyUncut ruby1Uncommon3,146
Uncut diamondUncut diamond1; 2; 45–55 (noted)Uncommon5,764–317,020
Loop half of a keyLoop half of a key1Uncommon24,334
Tooth half of a keyTooth half of a key1Uncommon37,914
Uncut dragonstoneUncut dragonstone1; 45–55 (noted)Uncommon14,086–774,730
Dragon longswordDragon longsword1Uncommon58,058
Dragon spearDragon spear1Uncommon35,813
BattlestaffBattlestaff180–220 (noted)Uncommon1,384,920–1,692,680
Rune javelinRune javelin5Rare905
Rune platebodyRune platebody1Uncommon38,063
Shield left halfShield left half1Uncommon64,265
Dragon helmDragon helm1Uncommon59,135
Rune arrowheads 5Rune arrowheads113–137Uncommon21,131–25,619
Onyx bolts 5Onyx bolts135–165Uncommon1,127,250–1,377,750
Vecna skullVecna skull1Uncommon69,778
Water talismanWater talisman65–82 (noted)Uncommon910,390–1,148,492
Earth talismanEarth talisman65–82 (noted)Uncommon298,870–377,036
Fire talismanFire talisman25–35 (noted)Uncommon106,425–148,995
Chaos talismanChaos talisman1Uncommon588
Nature talismanNature talisman1Uncommon294
Raw lobsterRaw lobster135–165 (noted)Uncommon47,250–57,750
Raw sharkRaw shark225–275 (noted)Uncommon251,550–307,450
Big bonesBig bones80–90 (noted)Uncommon37,600–42,300
Dragon bonesDragon bones180–220 (noted)Uncommon428,580–523,820
CoalCoal200–1,100 (noted)Uncommon59,800–328,900
Gold oreGold ore90–110 (noted)Uncommon20,700–25,300
Adamantite oreAdamantite ore180–220 (noted)Uncommon242,820–296,780
Adamant barAdamant bar15 (noted)Common43,320
Adamant barAdamant bar135–165 (noted)Rare389,880–476,520
Runite oreRunite ore90–110 (noted)Rare954,720–1,166,880
Rune barRune bar3 (noted)Common42,786
Rune barRune bar45–55 (noted)Rare641,790–784,410
Grimy torstolGrimy torstol90–110 (noted)Uncommon597,150–729,850
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon414,450–506,550
Super restore (4)Super restore (4)45–55 (noted)Uncommon247,860–302,940
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon185,715–226,985
Herb seed 5Lantadyme seed14–16Uncommon248,738–284,272
Herb seed 5Dwarf weed seed14–16Uncommon318,570–364,080
Magic seed 5Magic seed4Uncommon569,608
Palm tree seed 5Palm tree seed10Uncommon1,387,040
FlaxFlax450–550 (noted)Uncommon31,950–39,050
Molten glassMolten glass45–55 (noted)Uncommon12,330–15,070
Soft claySoft clay450–550 (noted)Uncommon105,750–129,250
Yew logsYew logs68–82; 675–825 (noted)Uncommon20,740–251,625
Teak plankTeak plank45–55 (noted)Uncommon44,100–53,900
Mahogany plankMahogany plank270–330 (noted)Uncommon658,260–804,540
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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