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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
BonesBones1Always213

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 rune1–39Common22–858
Earth runeEarth rune1–40Common20–800
Air talismanAir talisman1Uncommon316
Mind talismanMind talisman1Uncommon230
Fire talismanFire talisman1Uncommon1,203
Cosmic talismanCosmic talisman1Rare504
Body talismanBody talisman1Rare237
Water talismanWater talisman1Uncommon5,609
Earth talismanEarth talisman1Uncommon1,551
Nature talismanNature talisman1Rare1,179
Chaos talismanChaos talisman1Uncommon1,506
Steel platebodySteel platebody1Common2,057
Black clawBlack claw1Common[1]4,102
Off-hand black clawOff-hand black claw1Common[1]1,561
Black platebodyBlack platebody1Common1,948
Mithril hatchetMithril hatchet1Common1,521
Rock-shell glovesRock-shell gloves1Uncommon6,273
Rock-shell bootsRock-shell boots1Uncommon5,513
Black warhammerBlack warhammer1Uncommon1,756
Off-hand black warhammerOff-hand black warhammer1Uncommon717
Adamant longswordAdamant longsword1Uncommon5,129
Adamant warhammerAdamant warhammer1Rare3,205
Poison ivy seed 5Poison ivy seed1Uncommon105
Belladonna seed 5Belladonna seed1Uncommon862
Guam seed 5Guam seed1Uncommon21
Marrentill seed 5Marrentill seed1Uncommon15
Tarromin seed 5Tarromin seed1Uncommon8
Harralander seed 5Harralander seed1Uncommon22
Toadflax seed 5Toadflax seed1Uncommon3,471
Ranarr seed 5Ranarr seed1Rare1,009
Irit seed 5Irit seed1Rare339
Avantoe seed 5Avantoe seed1Rare310
Snapdragon seed 5Snapdragon seed1Rare385
Cadantine seed 5Cadantine seed1Rare1,897
Lantadyme seed 5Lantadyme seed1Rare593
Kwuarm seed 5Kwuarm seed1Rare6,713
Dwarf weed seed 5Dwarf weed seed1Very rare638
Torstol seed 5Torstol seed1Very rare1,817
Grimy guamGrimy guam1Uncommon354
Grimy marrentillGrimy marrentill1Uncommon353
Grimy tarrominGrimy tarromin1Uncommon27
Grimy harralanderGrimy harralander1Uncommon82
Grimy ranarrGrimy ranarr1Rare2,930
Grimy iritGrimy irit1Rare3,338
Grimy avantoeGrimy avantoe1Rare1,641
Grimy kwuarmGrimy kwuarm1Rare5,068
Grimy cadantineGrimy cadantine1Rare3,333
Grimy lantadymeGrimy lantadyme1Rare3,060
Grimy dwarf weedGrimy dwarf weed1Rare2,335
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common180
Raw bassRaw bass1Common287
TinderboxTinderbox1Common243
CasketCasket1Rare5,116
Rock-shell splinterRock-shell splinter1Uncommon2,285
Rock-shell chunkRock-shell chunk1Rare1,814
Rock-shell shardRock-shell shard1Rare6,422
  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 sapphire1Common970
Uncut emeraldUncut emerald1Common2,024
Uncut rubyUncut ruby1Common1,991
Uncut diamondUncut diamond1Common3,821
Uncut diamondUncut diamond45–55 (noted)Rare171,945–210,155
Loop half of a keyLoop half of a key1Common18,110
Tooth half of a keyTooth half of a key1Common21,443
Uncut dragonstoneUncut dragonstone1Uncommon11,317
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare509,265–622,435
Dragon longswordDragon longsword1Common56,801
Dragon spearDragon spear1Rare36,867
BattlestaffBattlestaff180–220 (noted)Rare1,081,260–1,321,540
Rune javelinRune javelin5Rare905
Rune platebodyRune platebody1Uncommon37,768
Rune platebodyRune platebody15–25 (noted)Rare566,520–944,200
Shield left halfShield left half1Rare64,779
Dragon helmDragon helm1Uncommon58,809
Rune arrowheads 5Rune arrowheads113–137Common28,589–34,661
Onyx bolts 5Onyx bolts135–165Very rare1,057,455–1,292,445
Chaos talismanChaos talisman1Rare1,506
Nature talismanNature talisman1Rare1,179
Water talismanWater talisman65–82 (noted)Rare364,585–459,938
Earth talismanEarth talisman65–82 (noted)Rare100,815–127,182
Fire talismanFire talisman25–35 (noted)Rare30,075–42,105
Raw lobsterRaw lobster135–165 (noted)Common24,300–29,700
Raw sharkRaw shark225–275 (noted)Uncommon268,200–327,800
Big bonesBig bones72–90 (noted)Uncommon15,984–19,980
Dragon bonesDragon bones180–220 (noted)Rare269,280–329,120
CoalCoal200–1,100 (noted)Uncommon25,800–141,900
Gold oreGold ore90–110 (noted)Common17,820–21,780
Adamantite oreAdamantite ore180–220 (noted)Uncommon268,740–328,460
Adamant barAdamant bar14–16 (noted)Common41,888–47,872
Adamant barAdamant bar135–165 (noted)Rare403,920–493,680
Runite oreRunite ore90–110 (noted)Rare1,057,860–1,292,940
Rune barRune bar(noted)Common41,589
Rune barRune bar45–55 (noted)Rare623,835–762,465
Grimy torstolGrimy torstol90–110 (noted)Uncommon340,470–416,130
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon231,840–283,360
Super restore (4)Super restore (4)45–55 (noted)Uncommon257,040–314,160
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon189,225–231,275
Lantadyme seed 5Lantadyme seed14–16Uncommon8,302–9,488
Dwarf weed seed 5Dwarf weed seed14–16Uncommon8,932–10,208
Magic seed 5Magic seed4Uncommon402,276
Palm tree seed 5Palm tree seed10Rare1,699,870
FlaxFlax450–550 (noted)Common15,750–19,250
Molten glassMolten glass45–55 (noted)Common11,745–14,355
Soft claySoft clay450–550 (noted)Uncommon234,450–286,550
Yew logsYew logs68–82Uncommon13,192–15,908
Yew logsYew logs675–825 (noted)Rare130,950–160,050
Teak plankTeak plank45–55 (noted)Uncommon32,805–40,095
Mahogany plankMahogany plank270–330 (noted)Rare399,600–488,400
Blurberry specialBlurberry special1Uncommon1,991
Vecna skullVecna skull1Very rare*192,600
Hazelmere's signet ringHazelmere's signet ring1Very rare*1,804,467,420
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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