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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
BonesBones1Always226

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 talisman1Uncommon289
Mind talismanMind talisman1Uncommon232
Fire talismanFire talisman1Uncommon1,170
Cosmic talismanCosmic talisman1Rare419
Body talismanBody talisman1Rare240
Water talismanWater talisman1Uncommon5,602
Earth talismanEarth talisman1Uncommon1,583
Nature talismanNature talisman1Rare1,177
Chaos talismanChaos talisman1Uncommon1,313
Steel platebodySteel platebody1Common2,251
Black clawBlack claw1Common[1]4,230
Off-hand black clawOff-hand black claw1Common[1]1,613
Black platebodyBlack platebody1Common2,085
Mithril hatchetMithril hatchet1Common1,633
Rock-shell glovesRock-shell gloves1Uncommon5,956
Rock-shell bootsRock-shell boots1Uncommon5,922
Black warhammerBlack warhammer1Uncommon1,685
Off-hand black warhammerOff-hand black warhammer1Uncommon730
Adamant longswordAdamant longsword1Uncommon5,206
Adamant warhammerAdamant warhammer1Rare3,185
Poison ivy seed 5Poison ivy seed1Uncommon112
Belladonna seed 5Belladonna seed1Uncommon871
Guam seed 5Guam seed1Uncommon23
Marrentill seed 5Marrentill seed1Uncommon15
Tarromin seed 5Tarromin seed1Uncommon9
Harralander seed 5Harralander seed1Uncommon23
Toadflax seed 5Toadflax seed1Uncommon3,045
Ranarr seed 5Ranarr seed1Rare977
Irit seed 5Irit seed1Rare388
Avantoe seed 5Avantoe seed1Rare295
Snapdragon seed 5Snapdragon seed1Rare332
Cadantine seed 5Cadantine seed1Rare1,106
Lantadyme seed 5Lantadyme seed1Rare570
Kwuarm seed 5Kwuarm seed1Rare4,509
Dwarf weed seed 5Dwarf weed seed1Very rare641
Torstol seed 5Torstol seed1Very rare1,358
Grimy guamGrimy guam1Uncommon293
Grimy marrentillGrimy marrentill1Uncommon352
Grimy tarrominGrimy tarromin1Uncommon24
Grimy harralanderGrimy harralander1Uncommon73
Grimy ranarrGrimy ranarr1Rare2,604
Grimy iritGrimy irit1Rare3,198
Grimy avantoeGrimy avantoe1Rare1,626
Grimy kwuarmGrimy kwuarm1Rare4,993
Grimy cadantineGrimy cadantine1Rare3,021
Grimy lantadymeGrimy lantadyme1Rare3,181
Grimy dwarf weedGrimy dwarf weed1Rare2,205
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common183
Raw bassRaw bass1Common305
TinderboxTinderbox1Common269
CasketCasket1Rare4,707
Rock-shell splinterRock-shell splinter1Uncommon2,389
Rock-shell chunkRock-shell chunk1Rare1,814
Rock-shell shardRock-shell shard1Rare6,449
  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 sapphire1Common942
Uncut emeraldUncut emerald1Common1,879
Uncut rubyUncut ruby1Common2,022
Uncut diamondUncut diamond1Common3,850
Uncut diamondUncut diamond45–55 (noted)Rare173,250–211,750
Loop half of a keyLoop half of a key1Common21,216
Tooth half of a keyTooth half of a key1Common24,960
Uncut dragonstoneUncut dragonstone1Uncommon11,518
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare518,310–633,490
Dragon longswordDragon longsword1Common57,279
Dragon spearDragon spear1Rare35,119
BattlestaffBattlestaff180–220 (noted)Rare1,080,180–1,320,220
Rune javelinRune javelin5Rare850
Rune platebodyRune platebody1Uncommon37,679
Rune platebodyRune platebody15–25 (noted)Rare565,185–941,975
Shield left halfShield left half1Rare64,101
Dragon helmDragon helm1Uncommon58,738
Rune arrowheads 5Rune arrowheads113–137Common29,493–35,757
Onyx bolts 5Onyx bolts135–165Very rare1,053,675–1,287,825
Chaos talismanChaos talisman1Rare1,313
Nature talismanNature talisman1Rare1,177
Water talismanWater talisman65–82 (noted)Rare364,130–459,364
Earth talismanEarth talisman65–82 (noted)Rare102,895–129,806
Fire talismanFire talisman25–35 (noted)Rare29,250–40,950
Raw lobsterRaw lobster135–165 (noted)Common24,705–30,195
Raw sharkRaw shark225–275 (noted)Uncommon278,100–339,900
Big bonesBig bones72–90 (noted)Uncommon13,896–17,370
Dragon bonesDragon bones180–220 (noted)Rare296,640–362,560
CoalCoal200–1,100 (noted)Uncommon27,800–152,900
Gold oreGold ore90–110 (noted)Common16,110–19,690
Adamantite oreAdamantite ore180–220 (noted)Uncommon262,800–321,200
Adamant barAdamant bar14–16 (noted)Common42,812–48,928
Adamant barAdamant bar135–165 (noted)Rare412,830–504,570
Runite oreRunite ore90–110 (noted)Rare1,019,700–1,246,300
Rune barRune bar(noted)Common41,334
Rune barRune bar45–55 (noted)Rare620,010–757,790
Grimy torstolGrimy torstol90–110 (noted)Uncommon356,940–436,260
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon222,210–271,590
Super restore (4)Super restore (4)45–55 (noted)Uncommon235,080–287,320
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon176,490–215,710
Lantadyme seed 5Lantadyme seed14–16Uncommon7,980–9,120
Dwarf weed seed 5Dwarf weed seed14–16Uncommon8,974–10,256
Magic seed 5Magic seed4Uncommon405,992
Palm tree seed 5Palm tree seed10Rare1,710,670
FlaxFlax450–550 (noted)Common15,750–19,250
Molten glassMolten glass45–55 (noted)Common11,385–13,915
Soft claySoft clay450–550 (noted)Uncommon216,450–264,550
Yew logsYew logs68–82Uncommon13,192–15,908
Yew logsYew logs675–825 (noted)Rare130,950–160,050
Teak plankTeak plank45–55 (noted)Uncommon36,180–44,220
Mahogany plankMahogany plank270–330 (noted)Rare441,990–540,210
Blurberry specialBlurberry special1Uncommon1,991
Vecna skullVecna skull1Very rare*207,972
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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