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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
BonesBones1Always209

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 talisman1Uncommon318
Mind talismanMind talisman1Uncommon222
Fire talismanFire talisman1Uncommon1,219
Cosmic talismanCosmic talisman1Rare527
Body talismanBody talisman1Rare234
Water talismanWater talisman1Uncommon5,339
Earth talismanEarth talisman1Uncommon1,518
Nature talismanNature talisman1Rare1,179
Chaos talismanChaos talisman1Uncommon1,558
Steel platebodySteel platebody1Common2,004
Black clawBlack claw1Common[1]4,102
Off-hand black clawOff-hand black claw1Common[1]1,561
Black platebodyBlack platebody1Common2,017
Mithril hatchetMithril hatchet1Common1,457
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 longsword1Uncommon5,273
Adamant warhammerAdamant warhammer1Rare3,205
Poison ivy seed 5Poison ivy seed1Uncommon109
Belladonna seed 5Belladonna seed1Uncommon862
Guam seed 5Guam seed1Uncommon21
Marrentill seed 5Marrentill seed1Uncommon15
Tarromin seed 5Tarromin seed1Uncommon9
Harralander seed 5Harralander seed1Uncommon22
Toadflax seed 5Toadflax seed1Uncommon3,207
Ranarr seed 5Ranarr seed1Rare1,026
Irit seed 5Irit seed1Rare344
Avantoe seed 5Avantoe seed1Rare316
Snapdragon seed 5Snapdragon seed1Rare399
Cadantine seed 5Cadantine seed1Rare1,954
Lantadyme seed 5Lantadyme seed1Rare591
Kwuarm seed 5Kwuarm seed1Rare6,692
Dwarf weed seed 5Dwarf weed seed1Very rare627
Torstol seed 5Torstol seed1Very rare2,015
Grimy guamGrimy guam1Uncommon362
Grimy marrentillGrimy marrentill1Uncommon337
Grimy tarrominGrimy tarromin1Uncommon27
Grimy harralanderGrimy harralander1Uncommon85
Grimy ranarrGrimy ranarr1Rare2,975
Grimy iritGrimy irit1Rare3,365
Grimy avantoeGrimy avantoe1Rare1,683
Grimy kwuarmGrimy kwuarm1Rare5,063
Grimy cadantineGrimy cadantine1Rare3,291
Grimy lantadymeGrimy lantadyme1Rare3,054
Grimy dwarf weedGrimy dwarf weed1Rare2,327
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common179
Raw bassRaw bass1Common297
TinderboxTinderbox1Common236
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 sapphire1Common972
Uncut emeraldUncut emerald1Common2,117
Uncut rubyUncut ruby1Common2,059
Uncut diamondUncut diamond1Common3,832
Uncut diamondUncut diamond45–55 (noted)Rare172,440–210,760
Loop half of a keyLoop half of a key1Common18,161
Tooth half of a keyTooth half of a key1Common21,536
Uncut dragonstoneUncut dragonstone1Uncommon11,239
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare505,755–618,145
Dragon longswordDragon longsword1Common56,750
Dragon spearDragon spear1Rare36,844
BattlestaffBattlestaff180–220 (noted)Rare1,088,100–1,329,900
Rune javelinRune javelin5Rare885
Rune platebodyRune platebody1Uncommon37,770
Rune platebodyRune platebody15–25 (noted)Rare566,550–944,250
Shield left halfShield left half1Rare64,779
Dragon helmDragon helm1Uncommon58,659
Rune arrowheads 5Rune arrowheads113–137Common28,702–34,798
Onyx bolts 5Onyx bolts135–165Very rare1,057,455–1,292,445
Chaos talismanChaos talisman1Rare1,558
Nature talismanNature talisman1Rare1,179
Water talismanWater talisman65–82 (noted)Rare347,035–437,798
Earth talismanEarth talisman65–82 (noted)Rare98,670–124,476
Fire talismanFire talisman25–35 (noted)Rare30,475–42,665
Raw lobsterRaw lobster135–165 (noted)Common24,165–29,535
Raw sharkRaw shark225–275 (noted)Uncommon270,000–330,000
Big bonesBig bones72–90 (noted)Uncommon16,128–20,160
Dragon bonesDragon bones180–220 (noted)Rare270,540–330,660
CoalCoal200–1,100 (noted)Uncommon26,000–143,000
Gold oreGold ore90–110 (noted)Common18,090–22,110
Adamantite oreAdamantite ore180–220 (noted)Uncommon271,800–332,200
Adamant barAdamant bar14–16 (noted)Common41,930–47,920
Adamant barAdamant bar135–165 (noted)Rare404,325–494,175
Runite oreRunite ore90–110 (noted)Rare1,064,790–1,301,410
Rune barRune bar(noted)Common41,697
Rune barRune bar45–55 (noted)Rare625,455–764,445
Grimy torstolGrimy torstol90–110 (noted)Uncommon340,470–416,130
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon226,800–277,200
Super restore (4)Super restore (4)45–55 (noted)Uncommon256,275–313,225
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon187,650–229,350
Lantadyme seed 5Lantadyme seed14–16Uncommon8,274–9,456
Dwarf weed seed 5Dwarf weed seed14–16Uncommon8,778–10,032
Magic seed 5Magic seed4Uncommon409,740
Palm tree seed 5Palm tree seed10Rare1,721,080
FlaxFlax450–550 (noted)Common15,750–19,250
Molten glassMolten glass45–55 (noted)Common11,790–14,410
Soft claySoft clay450–550 (noted)Uncommon242,550–296,450
Yew logsYew logs68–82Uncommon13,464–16,236
Yew logsYew logs675–825 (noted)Rare133,650–163,350
Teak plankTeak plank45–55 (noted)Uncommon34,560–42,240
Mahogany plankMahogany plank270–330 (noted)Rare402,030–491,370
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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