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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
BonesBones1Always267

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 rune1–39Common29–1,131
Earth runeEarth rune1–40Common25–1,000
Air talismanAir talisman1Uncommon307
Mind talismanMind talisman1Uncommon312
Fire talismanFire talisman1Uncommon1,391
Cosmic talismanCosmic talisman1Rare325
Body talismanBody talisman1Rare300
Water talismanWater talisman1Uncommon5,742
Earth talismanEarth talisman1Uncommon2,001
Nature talismanNature talisman1Rare1,599
Chaos talismanChaos talisman1Uncommon1,144
Steel platebodySteel platebody1Common2,122
Black clawBlack claw1Common[1]2,871
Off-hand black clawOff-hand black claw1Common[1]1,252
Black platebodyBlack platebody1Common1,921
Mithril hatchetMithril hatchet1Common1,111
Rock-shell glovesRock-shell gloves1Uncommon7,129
Rock-shell bootsRock-shell boots1Uncommon4,597
Black warhammerBlack warhammer1Uncommon1,635
Off-hand black warhammerOff-hand black warhammer1Uncommon597
Adamant longswordAdamant longsword1Uncommon4,135
Adamant warhammerAdamant warhammer1Rare2,480
Poison ivy seed 5Poison ivy seed1Uncommon104
Belladonna seed 5Belladonna seed1Uncommon539
Guam seed 5Guam seed1Uncommon23
Marrentill seed 5Marrentill seed1Uncommon26
Tarromin seed 5Tarromin seed1Uncommon30
Harralander seed 5Harralander seed1Uncommon40
Toadflax seed 5Toadflax seed1Uncommon3,062
Ranarr seed 5Ranarr seed1Rare1,467
Irit seed 5Irit seed1Rare1,130
Avantoe seed 5Avantoe seed1Rare487
Snapdragon seed 5Snapdragon seed1Rare575
Cadantine seed 5Cadantine seed1Rare4,090
Lantadyme seed 5Lantadyme seed1Rare1,184
Kwuarm seed 5Kwuarm seed1Rare8,124
Dwarf weed seed 5Dwarf weed seed1Very rare1,135
Torstol seed 5Torstol seed1Very rare2,698
Grimy guamGrimy guam1Uncommon163
Grimy marrentillGrimy marrentill1Uncommon212
Grimy tarrominGrimy tarromin1Uncommon32
Grimy harralanderGrimy harralander1Uncommon83
Grimy ranarrGrimy ranarr1Rare3,326
Grimy iritGrimy irit1Rare3,464
Grimy avantoeGrimy avantoe1Rare2,143
Grimy kwuarmGrimy kwuarm1Rare5,392
Grimy cadantineGrimy cadantine1Rare5,115
Grimy lantadymeGrimy lantadyme1Rare3,820
Grimy dwarf weedGrimy dwarf weed1Rare2,608
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common141
Raw bassRaw bass1Common329
TinderboxTinderbox1Common387
CasketCasket1Rare2,353
Rock-shell splinterRock-shell splinter1Uncommon2,109
Rock-shell chunkRock-shell chunk1Rare1,807
Rock-shell shardRock-shell shard1Rare7,036
  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 sapphire1Common1,056
Uncut emeraldUncut emerald1Common2,114
Uncut rubyUncut ruby1Common2,498
Uncut diamondUncut diamond1Common4,364
Uncut diamondUncut diamond45–55 (noted)Rare196,380–240,020
Loop half of a keyLoop half of a key1Common18,157
Tooth half of a keyTooth half of a key1Common22,027
Uncut dragonstoneUncut dragonstone1Uncommon12,146
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare546,570–668,030
Dragon longswordDragon longsword1Common55,696
Dragon spearDragon spear1Rare35,470
BattlestaffBattlestaff180–220 (noted)Rare1,211,220–1,480,380
Rune javelinRune javelin5Rare850
Rune platebodyRune platebody1Uncommon37,330
Rune platebodyRune platebody15–25 (noted)Rare559,950–933,250
Shield left halfShield left half1Rare65,544
Dragon helmDragon helm1Uncommon58,478
Rune arrowheads 5Rune arrowheads113–137Common19,097–23,153
Onyx bolts 5Onyx bolts135–165Very rare1,044,630–1,276,770
Chaos talismanChaos talisman1Rare1,144
Nature talismanNature talisman1Rare1,599
Water talismanWater talisman65–82 (noted)Rare373,230–470,844
Earth talismanEarth talisman65–82 (noted)Rare130,065–164,082
Fire talismanFire talisman25–35 (noted)Rare34,775–48,685
Raw lobsterRaw lobster135–165 (noted)Common19,035–23,265
Raw sharkRaw shark225–275 (noted)Uncommon326,025–398,475
Big bonesBig bones72–90 (noted)Uncommon27,216–34,020
Dragon bonesDragon bones180–220 (noted)Rare287,820–351,780
CoalCoal200–1,100 (noted)Uncommon32,200–177,100
Gold oreGold ore90–110 (noted)Common15,840–19,360
Adamantite oreAdamantite ore180–220 (noted)Uncommon205,740–251,460
Adamant barAdamant bar14–16 (noted)Common37,898–43,312
Adamant barAdamant bar135–165 (noted)Rare365,445–446,655
Runite oreRunite ore90–110 (noted)Rare996,840–1,218,360
Rune barRune bar(noted)Common41,244
Rune barRune bar45–55 (noted)Rare618,660–756,140
Grimy torstolGrimy torstol90–110 (noted)Uncommon392,940–480,260
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon314,100–383,900
Super restore (4)Super restore (4)45–55 (noted)Uncommon302,220–369,380
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon205,695–251,405
Lantadyme seed 5Lantadyme seed14–16Uncommon16,576–18,944
Dwarf weed seed 5Dwarf weed seed14–16Uncommon15,890–18,160
Magic seed 5Magic seed4Uncommon447,204
Palm tree seed 5Palm tree seed10Rare1,884,960
FlaxFlax450–550 (noted)Common9,000–11,000
Molten glassMolten glass45–55 (noted)Common14,400–17,600
Soft claySoft clay450–550 (noted)Uncommon324,450–396,550
Yew logsYew logs68–82Uncommon13,192–15,908
Yew logsYew logs675–825 (noted)Rare130,950–160,050
Teak plankTeak plank45–55 (noted)Uncommon43,470–53,130
Mahogany plankMahogany plank270–330 (noted)Rare612,900–749,100
Blurberry specialBlurberry special1Uncommon1,820
Vecna skullVecna skull1Very rare*246,534
Hazelmere's signet ringHazelmere's signet ring1Very rare*54,450,672
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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