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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 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
BonesBones1Always235

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 rune1–39Common18–702
Earth runeEarth rune1–40Common20–800
Air talismanAir talisman1Uncommon216
Mind talismanMind talisman1Uncommon270
Fire talismanFire talisman1Uncommon1,311
Cosmic talismanCosmic talisman1Rare436
Body talismanBody talisman1Rare257
Water talismanWater talisman1Uncommon5,270
Earth talismanEarth talisman1Uncommon1,867
Nature talismanNature talisman1Rare897
Chaos talismanChaos talisman1Uncommon1,260
Steel platebodySteel platebody1Common1,876
Black clawBlack claw1Common[1]2,347
Off-hand black clawOff-hand black claw1Common[1]1,115
Black platebodyBlack platebody1Common2,220
Mithril hatchetMithril hatchet1Common1,335
Rock-shell glovesRock-shell gloves1Uncommon8,497
Rock-shell bootsRock-shell boots1Uncommon3,297
Black warhammerBlack warhammer1Uncommon1,578
Off-hand black warhammerOff-hand black warhammer1Uncommon528
Adamant longswordAdamant longsword1Uncommon4,547
Adamant warhammerAdamant warhammer1Rare2,407
Poison ivy seed 5Poison ivy seed1Uncommon69
Belladonna seed 5Belladonna seed1Uncommon319
Guam seed 5Guam seed1Uncommon21
Marrentill seed 5Marrentill seed1Uncommon31
Tarromin seed 5Tarromin seed1Uncommon43
Harralander seed 5Harralander seed1Uncommon23
Toadflax seed 5Toadflax seed1Uncommon3,040
Ranarr seed 5Ranarr seed1Rare1,351
Irit seed 5Irit seed1Rare685
Avantoe seed 5Avantoe seed1Rare656
Snapdragon seed 5Snapdragon seed1Rare933
Cadantine seed 5Cadantine seed1Rare6,289
Lantadyme seed 5Lantadyme seed1Rare1,655
Kwuarm seed 5Kwuarm seed1Rare7,148
Dwarf weed seed 5Dwarf weed seed1Very rare1,234
Torstol seed 5Torstol seed1Very rare3,364
Grimy guamGrimy guam1Uncommon121
Grimy marrentillGrimy marrentill1Uncommon152
Grimy tarrominGrimy tarromin1Uncommon32
Grimy harralanderGrimy harralander1Uncommon83
Grimy ranarrGrimy ranarr1Rare3,227
Grimy iritGrimy irit1Rare3,009
Grimy avantoeGrimy avantoe1Rare2,181
Grimy kwuarmGrimy kwuarm1Rare5,117
Grimy cadantineGrimy cadantine1Rare4,867
Grimy lantadymeGrimy lantadyme1Rare3,634
Grimy dwarf weedGrimy dwarf weed1Rare2,630
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common145
Raw bassRaw bass1Common305
TinderboxTinderbox1Common284
CasketCasket1Rare2,585
Rock-shell splinterRock-shell splinter1Uncommon1,980
Rock-shell chunkRock-shell chunk1Rare1,809
Rock-shell shardRock-shell shard1Rare7,481
  1. ^ a b Main hand and off hand claws are dropped together.

Tertiary dropsEdit

Item Quantity Rarity GE price
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.
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 1000Coins250–500; 3,000Common250–3,000
Uncut sapphireUncut sapphire1Common935
Uncut emeraldUncut emerald1Common1,902
Uncut rubyUncut ruby1Common2,498
Uncut diamondUncut diamond1Common4,010
Uncut diamondUncut diamond45–55 (noted)Rare180,450–220,550
Loop half of a keyLoop half of a key1Common20,689
Tooth half of a keyTooth half of a key1Common23,923
Uncut dragonstoneUncut dragonstone1Uncommon11,365
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare511,425–625,075
Dragon longswordDragon longsword1Common55,488
Dragon spearDragon spear1Rare35,555
BattlestaffBattlestaff180–220 (noted)Rare1,223,100–1,494,900
Rune javelinRune javelin5Rare920
Rune platebodyRune platebody1Uncommon37,182
Rune platebodyRune platebody15–25 (noted)Rare557,730–929,550
Shield left halfShield left half1Rare64,251
Dragon helmDragon helm1Uncommon58,835
Rune arrowheads 5Rune arrowheads113–137Common19,549–23,701
Onyx bolts 5Onyx bolts135–165Very rare1,046,115–1,278,585
Chaos talismanChaos talisman1Rare1,260
Nature talismanNature talisman1Rare897
Water talismanWater talisman65–82 (noted)Rare342,550–432,140
Earth talismanEarth talisman65–82 (noted)Rare121,355–153,094
Fire talismanFire talisman25–35 (noted)Rare32,775–45,885
Raw lobsterRaw lobster135–165 (noted)Common19,575–23,925
Raw sharkRaw shark225–275 (noted)Uncommon257,850–315,150
Big bonesBig bones72–90 (noted)Uncommon26,928–33,660
Dragon bonesDragon bones180–220 (noted)Rare302,940–370,260
CoalCoal200–1,100 (noted)Uncommon35,200–193,600
Gold oreGold ore90–110 (noted)Common14,670–17,930
Adamantite oreAdamantite ore180–220 (noted)Uncommon208,440–254,760
Adamant barAdamant bar14–16 (noted)Common36,624–41,856
Adamant barAdamant bar135–165 (noted)Rare353,160–431,640
Runite oreRunite ore90–110 (noted)Rare970,470–1,186,130
Rune barRune bar(noted)Common41,241
Rune barRune bar45–55 (noted)Rare618,615–756,085
Grimy torstolGrimy torstol90–110 (noted)Uncommon380,790–465,410
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon288,090–352,110
Super restore (4)Super restore (4)45–55 (noted)Uncommon264,510–323,290
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon213,840–261,360
Lantadyme seed 5Lantadyme seed14–16Uncommon23,170–26,480
Dwarf weed seed 5Dwarf weed seed14–16Uncommon17,276–19,744
Magic seed 5Magic seed4Uncommon545,880
Palm tree seed 5Palm tree seed10Rare2,449,240
FlaxFlax450–550 (noted)Common5,850–7,150
Molten glassMolten glass45–55 (noted)Common13,950–17,050
Soft claySoft clay450–550 (noted)Uncommon173,250–211,750
Yew logsYew logs68–82Uncommon13,872–16,728
Yew logsYew logs675–825 (noted)Rare137,700–168,300
Teak plankTeak plank45–55 (noted)Uncommon32,805–40,095
Mahogany plankMahogany plank270–330 (noted)Rare565,650–691,350
Blurberry specialBlurberry special1Uncommon1,792
Vecna skullVecna skull1Very rare*348,450
Hazelmere's signet ringHazelmere's signet ring1Very rare*18,309,594
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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