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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
BonesBones1Always215

Runes/TalismansEdit

Item Quantity Rarity GE market price
Water runeWater rune1–39Common14–546
Earth runeEarth rune2–37Common20–370
Air talismanAir talisman1Uncommon124
Mind talismanMind talisman1Uncommon191
Fire talismanFire talisman1Uncommon2,625
Cosmic talismanCosmic talisman1Rare521
Body talismanBody talisman1Rare211
Water talismanWater talisman1Uncommon11,355
Earth talismanEarth talisman1Uncommon2,799
Nature talismanNature talisman1Rare199
Chaos talismanChaos talisman1Uncommon561

Weaponry/ArmourEdit

Item Quantity Rarity GE market price
Steel platebodySteel platebody1Common1,730
Black clawBlack claw1Uncommon [1]238
Off-hand black clawOff-hand black claw1Uncommon [1]789
Black platebodyBlack platebody1Common1,989
Mithril hatchetMithril hatchet1Uncommon113
Rock-shell glovesRock-shell gloves1Uncommon24,967
Rock-shell bootsRock-shell boots1Uncommon7,211
Black warhammerBlack warhammer1Uncommon622
Off-hand black warhammerOff-hand black warhammer1Uncommon297
Adamant longswordAdamant longsword1Uncommon1,372
Adamant warhammerAdamant warhammer1Rare2,532
  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 seed1Uncommon13
Belladonna seed 5Belladonna seed1Uncommon108
Herb seed 5Guam seed1Uncommon6
Herb seed 5Marrentill seed1Uncommon7
Herb seed 5Tarromin seed1Uncommon3
Herb seed 5Harralander seed1Uncommon7
Herb seed 5Toadflax seed1Rare2,155
Herb seed 5Ranarr seed1Rare781
Herb seed 5Irit seed1Rare149
Herb seed 5Avantoe seed1Rare526
Herb seed 5Snapdragon seed1Rare717
Herb seed 5Cadantine seed1Rare458
Herb seed 5Lantadyme seed1Rare12,268
Herb seed 5Dwarf weed seed1Very rare16,507
Herb seed 5Torstol seed1Very rare9,887

HerbsEdit

Item Quantity Rarity GE market price
Grimy guamGrimy guam1Uncommon441
Grimy marrentillGrimy marrentill1Uncommon159
Grimy tarrominGrimy tarromin1Uncommon25
Grimy harralanderGrimy harralander1Uncommon104
Grimy ranarrGrimy ranarr1Rare2,456
Grimy iritGrimy irit1Rare1,988
Grimy avantoeGrimy avantoe1Rare3,700
Grimy kwuarmGrimy kwuarm1Rare4,247
Grimy cadantineGrimy cadantine1Rare3,215
Grimy lantadymeGrimy lantadyme1Rare5,812
Grimy dwarf weedGrimy dwarf weed1Rare6,239

OtherEdit

Item Quantity Rarity GE market price
Coins 100Coins27; 28; 42; 70; 137CommonNot sold
Raw lobsterRaw lobster1Common214
Raw bassRaw bass1Common394
TinderboxTinderbox1Common226
CasketCasket1Rare2,871
Rock-shell splinterRock-shell splinter1Uncommon13,404
Rock-shell chunkRock-shell chunk1Rare8,195
Rock-shell shardRock-shell shard1Rare6,660
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 sapphire1Common882
Uncut emeraldUncut emerald1Common1,492
Uncut rubyUncut ruby1Common2,440
Uncut diamondUncut diamond1Common3,930
Uncut diamondUncut diamond45–55 (noted)Rare176,850–216,150
Loop half of a keyLoop half of a key1Uncommon17,130
Tooth half of a keyTooth half of a key1Uncommon41,427
Uncut dragonstoneUncut dragonstone1Uncommon12,717
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare572,265–699,435
Dragon longswordDragon longsword1Common57,773
Dragon spearDragon spear1Uncommon35,894
BattlestaffBattlestaff180–220 (noted)Uncommon1,299,060–1,587,740
Rune javelinRune javelin5Rare875
Rune platebodyRune platebody1Uncommon38,032
Rune platebodyRune platebody15–25 (noted)Rare570,480–950,800
Shield left halfShield left half1Uncommon64,402
Dragon helmDragon helm1Uncommon59,003
Rune arrowheads 5Rune arrowheads113–137Common20,453–24,797
Onyx bolts 5Onyx bolts135–165Rare1,150,200–1,405,800
Vecna skullVecna skull1Uncommon47,299
Chaos talismanChaos talisman1Uncommon561
Nature talismanNature talisman1Uncommon199
Water talismanWater talisman65–82 (noted)Rare738,075–931,110
Earth talismanEarth talisman65–82 (noted)Rare181,935–229,518
Fire talismanFire talisman25–35 (noted)Rare65,625–91,875
Raw lobsterRaw lobster135–165 (noted)Uncommon28,890–35,310
Raw sharkRaw shark225–275 (noted)Uncommon256,950–314,050
Big bonesBig bones80–90 (noted)Uncommon32,800–36,900
Dragon bonesDragon bones180–220 (noted)Uncommon396,900–485,100
CoalCoal200–1,100 (noted)Uncommon60,400–332,200
Gold oreGold ore90–110 (noted)Common16,470–20,130
Adamantite oreAdamantite ore180–220 (noted)Uncommon222,480–271,920
Adamant barAdamant bar15 (noted)Common40,905
Adamant barAdamant bar135–165 (noted)Rare368,145–449,955
Runite oreRunite ore90–110 (noted)Rare979,650–1,197,350
Rune barRune bar3 (noted)Common42,888
Rune barRune bar45–55 (noted)Rare643,320–786,280
Grimy torstolGrimy torstol90–110 (noted)Uncommon464,760–568,040
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon325,440–397,760
Super restore (4)Super restore (4)45–55 (noted)Uncommon176,985–216,315
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon117,540–143,660
Herb seed 5Lantadyme seed14–16Uncommon171,752–196,288
Herb seed 5Dwarf weed seed14–16Uncommon231,098–264,112
Magic seed 5Magic seed4Uncommon603,944
Palm tree seed 5Palm tree seed10Rare1,834,490
FlaxFlax450–550 (noted)Common20,700–25,300
Molten glassMolten glass45–55 (noted)Common9,720–11,880
Soft claySoft clay450–550 (noted)Uncommon96,750–118,250
Yew logsYew logs68–82Uncommon18,972–22,878
Yew logsYew logs675–825 (noted)Rare188,325–230,175
Teak plankTeak plank45–55 (noted)Uncommon31,095–38,005
Mahogany plankMahogany plank270–330 (noted)Rare558,900–683,100
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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