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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
BonesBones1Always206

Runes/TalismansEdit

Item Quantity Rarity GE market price
Water runeWater rune1–39Common20–780
Earth runeEarth rune2–37Common28–518
Air talismanAir talisman1Uncommon118
Mind talismanMind talisman1Uncommon243
Fire talismanFire talisman1Uncommon2,805
Cosmic talismanCosmic talisman1Rare325
Body talismanBody talisman1Rare194
Water talismanWater talisman1Uncommon11,916
Earth talismanEarth talisman1Uncommon2,798
Nature talismanNature talisman1Rare222
Chaos talismanChaos talisman1Uncommon1,022

Weaponry/ArmourEdit

Item Quantity Rarity GE market price
Steel platebodySteel platebody1Common1,810
Black clawBlack claw1Uncommon[1]216
Off-hand black clawOff-hand black claw1Uncommon[1]674
Black platebodyBlack platebody1Common1,894
Mithril hatchetMithril hatchet1Uncommon122
Rock-shell glovesRock-shell gloves1Uncommon52,029
Rock-shell bootsRock-shell boots1Uncommon11,884
Black warhammerBlack warhammer1Uncommon741
Off-hand black warhammerOff-hand black warhammer1Uncommon308
Adamant longswordAdamant longsword1Uncommon1,381
Adamant warhammerAdamant warhammer1Rare2,545
  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.
Add data to the log
(Requires JavaScript to be enabled)

SeedsEdit

Item Quantity Rarity GE market price
Poison ivy seed 5Poison ivy seed1Uncommon18
Belladonna seed 5Belladonna seed1Uncommon130
Herb seed 5Guam seed1Uncommon6
Herb seed 5Marrentill seed1Uncommon24
Herb seed 5Tarromin seed1Uncommon58
Herb seed 5Harralander seed1Uncommon11
Herb seed 5Toadflax seed1Rare1,160
Herb seed 5Ranarr seed1Rare651
Herb seed 5Irit seed1Rare100
Herb seed 5Avantoe seed1Rare477
Herb seed 5Snapdragon seed1Rare391
Herb seed 5Cadantine seed1Rare413
Herb seed 5Lantadyme seed1Rare9,336
Herb seed 5Dwarf weed seed1Very rare12,345
Herb seed 5Torstol seed1Very rare5,309

HerbsEdit

Item Quantity Rarity GE market price
Grimy guamGrimy guam1Uncommon240
Grimy marrentillGrimy marrentill1Uncommon146
Grimy tarrominGrimy tarromin1Uncommon38
Grimy harralanderGrimy harralander1Uncommon84
Grimy ranarrGrimy ranarr1Rare2,319
Grimy iritGrimy irit1Rare1,942
Grimy avantoeGrimy avantoe1Rare4,556
Grimy kwuarmGrimy kwuarm1Rare5,219
Grimy cadantineGrimy cadantine1Rare3,493
Grimy lantadymeGrimy lantadyme1Rare5,924
Grimy dwarf weedGrimy dwarf weed1Rare6,199

OtherEdit

Item Quantity Rarity GE market price
Coins 100Coins27; 28; 42; 70; 137CommonNot sold
Raw lobsterRaw lobster1Common201
Raw bassRaw bass1Common374
TinderboxTinderbox1Common199
CasketCasket1Rare5,312
Rock-shell splinterRock-shell splinter1Uncommon14,095
Rock-shell chunkRock-shell chunk1Rare9,078
Rock-shell shardRock-shell shard1Rare7,685
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 sapphire1Common684
Uncut emeraldUncut emerald1Common1,425
Uncut rubyUncut ruby1Common2,491
Uncut diamondUncut diamond1Common3,955
Uncut diamondUncut diamond45–55 (noted)Rare177,975–217,525
Loop half of a keyLoop half of a key1Uncommon17,983
Tooth half of a keyTooth half of a key1Uncommon37,008
Uncut dragonstoneUncut dragonstone1Uncommon12,457
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare560,565–685,135
Dragon longswordDragon longsword1Common56,957
Dragon spearDragon spear1Uncommon36,022
BattlestaffBattlestaff180–220 (noted)Uncommon1,305,180–1,595,220
Rune javelinRune javelin5Rare810
Rune platebodyRune platebody1Uncommon37,956
Rune platebodyRune platebody15–25 (noted)Rare569,340–948,900
Shield left halfShield left half1Uncommon64,923
Dragon helmDragon helm1Uncommon58,794
Rune arrowheads 5Rune arrowheads113–137Common23,391–28,359
Onyx bolts 5Onyx bolts135–165Rare1,133,730–1,385,670
Vecna skullVecna skull1Uncommon40,117
Chaos talismanChaos talisman1Uncommon1,022
Nature talismanNature talisman1Uncommon222
Water talismanWater talisman65–82 (noted)Rare774,540–977,112
Earth talismanEarth talisman65–82 (noted)Rare181,870–229,436
Fire talismanFire talisman25–35 (noted)Rare70,125–98,175
Raw lobsterRaw lobster135–165 (noted)Uncommon27,135–33,165
Raw sharkRaw shark225–275 (noted)Uncommon181,125–221,375
Big bonesBig bones79–90 (noted)Uncommon30,573–34,830
Dragon bonesDragon bones180–220 (noted)Uncommon312,300–381,700
CoalCoal200–1,100 (noted)Uncommon77,800–427,900
Gold oreGold ore90–110 (noted)Common15,750–19,250
Adamantite oreAdamantite ore180–220 (noted)Uncommon230,040–281,160
Adamant barAdamant bar15 (noted)Common35,805
Adamant barAdamant bar135–165 (noted)Rare322,245–393,855
Runite oreRunite ore90–110 (noted)Rare928,080–1,134,320
Rune barRune bar3 (noted)Common42,834
Rune barRune bar45–55 (noted)Rare642,510–785,290
Grimy torstolGrimy torstol90–110 (noted)Uncommon407,430–497,970
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon348,750–426,250
Super restore (4)Super restore (4)45–55 (noted)Uncommon198,045–242,055
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon117,990–144,210
Herb seed 5Lantadyme seed14–16Uncommon130,704–149,376
Herb seed 5Dwarf weed seed14–16Uncommon172,830–197,520
Magic seed 5Magic seed4Uncommon498,812
Palm tree seed 5Palm tree seed10Rare1,577,240
FlaxFlax450–550 (noted)Common12,600–15,400
Molten glassMolten glass45–55 (noted)Common8,865–10,835
Soft claySoft clay450–550 (noted)Uncommon85,050–103,950
Yew logsYew logs68–82Uncommon17,680–21,320
Yew logsYew logs675–825 (noted)Rare175,500–214,500
Teak plankTeak plank45–55 (noted)Uncommon29,970–36,630
Mahogany plankMahogany plank270–330 (noted)Rare541,890–662,310
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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