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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 locations

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% dropsEdit

Item Quantity Rarity GE price
BonesBones1Always247

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 (requires JavaScript).

Main dropsEdit

Item Quantity Rarity GE price
Water runeWater rune1–39Common23–897
Earth runeEarth rune1–40Common20–800
Air talismanAir talisman1Uncommon326
Mind talismanMind talisman1Uncommon196
Fire talismanFire talisman1Uncommon2,185
Cosmic talismanCosmic talisman1Rare483
Body talismanBody talisman1Rare223
Water talismanWater talisman1Uncommon8,110
Earth talismanEarth talisman1Uncommon2,496
Nature talismanNature talisman1Rare2,027
Chaos talismanChaos talisman1Uncommon1,273
Steel platebodySteel platebody1Common2,518
Black clawBlack claw1Common[1]2,424
Off-hand black clawOff-hand black claw1Common[1]1,241
Black platebodyBlack platebody1Common2,227
Mithril hatchetMithril hatchet1Common1,517
Rock-shell glovesRock-shell gloves1Uncommon6,290
Rock-shell bootsRock-shell boots1Uncommon5,514
Black warhammerBlack warhammer1Uncommon1,781
Off-hand black warhammerOff-hand black warhammer1Uncommon1,018
Adamant longswordAdamant longsword1Uncommon4,539
Adamant warhammerAdamant warhammer1Rare3,093
Poison ivy seed 5Poison ivy seed1Uncommon191
Belladonna seed 5Belladonna seed1Uncommon805
Guam seed 5Guam seed1Uncommon21
Marrentill seed 5Marrentill seed1Uncommon17
Tarromin seed 5Tarromin seed1Uncommon35
Harralander seed 5Harralander seed1Uncommon41
Toadflax seed 5Toadflax seed1Uncommon2,948
Ranarr seed 5Ranarr seed1Rare1,017
Irit seed 5Irit seed1Rare643
Avantoe seed 5Avantoe seed1Rare323
Snapdragon seed 5Snapdragon seed1Rare492
Cadantine seed 5Cadantine seed1Rare1,464
Lantadyme seed 5Lantadyme seed1Rare651
Kwuarm seed 5Kwuarm seed1Rare5,035
Dwarf weed seed 5Dwarf weed seed1Very rare624
Torstol seed 5Torstol seed1Very rare954
Grimy guamGrimy guam1Uncommon303
Grimy marrentillGrimy marrentill1Uncommon256
Grimy tarrominGrimy tarromin1Uncommon22
Grimy harralanderGrimy harralander1Uncommon99
Grimy ranarrGrimy ranarr1Rare2,307
Grimy iritGrimy irit1Rare3,602
Grimy avantoeGrimy avantoe1Rare1,480
Grimy kwuarmGrimy kwuarm1Rare5,319
Grimy cadantineGrimy cadantine1Rare3,186
Grimy lantadymeGrimy lantadyme1Rare3,032
Grimy dwarf weedGrimy dwarf weed1Rare2,308
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common203
Raw bassRaw bass1Common442
TinderboxTinderbox1Common300
CasketCasket1Rare3,097
Rock-shell splinterRock-shell splinter1Uncommon2,816
Rock-shell chunkRock-shell chunk1Rare2,037
Rock-shell shardRock-shell shard1Rare5,946
  1. ^ a b Main hand and off hand claws are dropped together.

Tertiary dropsEdit

Item Quantity Rarity GE price
Sealed clue scroll (medium)Sealed 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.
Luck-enhancing items such as a ring of wealth or luck of the dwarves are not required to access the table.
Show/hide rare drop table
Item Quantity Rarity GE price
Coins 250Coins250–500Common250–500
Uncut sapphireUncut sapphire1Common717
Uncut emeraldUncut emerald1Common2,196
Uncut rubyUncut ruby1Common1,766
Uncut diamondUncut diamond1Common3,245
Uncut diamondUncut diamond45–55 (noted)Rare146,025–178,475
Loop half of a keyLoop half of a key1Common17,739
Tooth half of a keyTooth half of a key1Common20,642
Uncut dragonstoneUncut dragonstone1Uncommon12,046
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare542,070–662,530
Dragon longswordDragon longsword1Common58,234
Dragon spearDragon spear1Rare36,657
BattlestaffBattlestaff180–220 (noted)Rare1,103,760–1,349,040
Rune javelinRune javelin5Rare890
Rune platebodyRune platebody1Uncommon37,983
Rune platebodyRune platebody15–25 (noted)Rare569,745–949,575
Shield left halfShield left half1Rare65,103
Dragon helmDragon helm1Uncommon58,887
Rune arrowheads 5Rune arrowheads113–137Common21,922–26,578
Onyx bolts 5Onyx bolts135–165Very rare1,076,490–1,315,710
Chaos talismanChaos talisman1Rare1,273
Nature talismanNature talisman1Rare2,027
Water talismanWater talisman65–82 (noted)Rare527,150–665,020
Earth talismanEarth talisman65–82 (noted)Rare162,240–204,672
Fire talismanFire talisman25–35 (noted)Rare54,625–76,475
Raw lobsterRaw lobster135–165 (noted)Common27,405–33,495
Raw sharkRaw shark225–275 (noted)Uncommon241,875–295,625
Big bonesBig bones68–82 (noted)Uncommon13,396–16,154
Dragon bonesDragon bones180–220 (noted)Rare309,240–377,960
CoalCoal200–1,100 (noted)Uncommon26,600–146,300
Gold oreGold ore90–110 (noted)Common16,290–19,910
Adamantite oreAdamantite ore180–220 (noted)Uncommon278,640–340,560
Adamant barAdamant bar14–16 (noted)Common38,192–43,648
Adamant barAdamant bar135–165 (noted)Rare368,280–450,120
Runite oreRunite ore90–110 (noted)Rare1,087,200–1,328,800
Rune barRune bar(noted)Common41,472
Rune barRune bar45–55 (noted)Rare622,080–760,320
Grimy torstolGrimy torstol90–110 (noted)Uncommon350,370–428,230
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon145,980–178,420
Super restore (4)Super restore (4)45–55 (noted)Uncommon145,620–177,980
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon147,960–180,840
Lantadyme seed 5Lantadyme seed14–16Uncommon9,114–10,416
Dwarf weed seed 5Dwarf weed seed14–16Uncommon8,736–9,984
Magic seed 5Magic seed4Uncommon397,144
Palm tree seed 5Palm tree seed10Rare967,350
FlaxFlax450–550 (noted)Common20,700–25,300
Molten glassMolten glass45–55 (noted)Common8,505–10,395
Soft claySoft clay450–550 (noted)Uncommon198,450–242,550
Yew logsYew logs68–82 (noted)Uncommon11,084–13,366
Yew logsYew logs675–825 (noted)Rare110,025–134,475
Teak plankTeak plank45–55 (noted)Uncommon37,530–45,870
Mahogany plankMahogany plank270–330 (noted)Rare385,020–470,580
Blurberry SpecialBlurberry Special1Uncommon5,951
Vecna skullVecna skull1Very rare*346,779
Hazelmere's signet ringHazelmere's signet ring1Very rare*1,967,717,757
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
Mimic kill tokenMimic kill token1Very rare20,937

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.