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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
BonesBones1Always285

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 rune1–39Common25–975
Earth runeEarth rune1–40Common20–800
Air talismanAir talisman1Uncommon382
Mind talismanMind talisman1Uncommon320
Fire talismanFire talisman1Uncommon1,584
Cosmic talismanCosmic talisman1Rare467
Body talismanBody talisman1Rare272
Water talismanWater talisman1Uncommon6,619
Earth talismanEarth talisman1Uncommon2,056
Nature talismanNature talisman1Rare1,724
Chaos talismanChaos talisman1Uncommon1,803
Steel platebodySteel platebody1Common2,396
Black clawBlack claw1Common[1]3,124
Off-hand black clawOff-hand black claw1Common[1]1,299
Black platebodyBlack platebody1Common1,901
Mithril hatchetMithril hatchet1Common1,180
Rock-shell glovesRock-shell gloves1Uncommon6,361
Rock-shell bootsRock-shell boots1Uncommon4,746
Black warhammerBlack warhammer1Uncommon1,556
Off-hand black warhammerOff-hand black warhammer1Uncommon603
Adamant longswordAdamant longsword1Uncommon4,723
Adamant warhammerAdamant warhammer1Rare2,580
Poison ivy seed 5Poison ivy seed1Uncommon105
Belladonna seed 5Belladonna seed1Uncommon681
Guam seed 5Guam seed1Uncommon24
Marrentill seed 5Marrentill seed1Uncommon23
Tarromin seed 5Tarromin seed1Uncommon27
Harralander seed 5Harralander seed1Uncommon18
Toadflax seed 5Toadflax seed1Uncommon3,337
Ranarr seed 5Ranarr seed1Rare1,848
Irit seed 5Irit seed1Rare770
Avantoe seed 5Avantoe seed1Rare461
Snapdragon seed 5Snapdragon seed1Rare653
Cadantine seed 5Cadantine seed1Rare4,390
Lantadyme seed 5Lantadyme seed1Rare1,053
Kwuarm seed 5Kwuarm seed1Rare7,548
Dwarf weed seed 5Dwarf weed seed1Very rare948
Torstol seed 5Torstol seed1Very rare1,830
Grimy guamGrimy guam1Uncommon187
Grimy marrentillGrimy marrentill1Uncommon232
Grimy tarrominGrimy tarromin1Uncommon32
Grimy harralanderGrimy harralander1Uncommon102
Grimy ranarrGrimy ranarr1Rare3,639
Grimy iritGrimy irit1Rare3,694
Grimy avantoeGrimy avantoe1Rare2,428
Grimy kwuarmGrimy kwuarm1Rare5,976
Grimy cadantineGrimy cadantine1Rare5,295
Grimy lantadymeGrimy lantadyme1Rare4,264
Grimy dwarf weedGrimy dwarf weed1Rare2,944
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common147
Raw bassRaw bass1Common326
TinderboxTinderbox1Common368
CasketCasket1Rare3,020
Rock-shell splinterRock-shell splinter1Uncommon2,109
Rock-shell chunkRock-shell chunk1Rare1,799
Rock-shell shardRock-shell shard1Rare6,748
  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 sapphire1Common1,147
Uncut emeraldUncut emerald1Common2,273
Uncut rubyUncut ruby1Common2,715
Uncut diamondUncut diamond1Common4,670
Uncut diamondUncut diamond45–55 (noted)Rare210,150–256,850
Loop half of a keyLoop half of a key1Common19,163
Tooth half of a keyTooth half of a key1Common24,621
Uncut dragonstoneUncut dragonstone1Uncommon12,842
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare577,890–706,310
Dragon longswordDragon longsword1Common55,279
Dragon spearDragon spear1Rare35,557
BattlestaffBattlestaff180–220 (noted)Rare1,232,280–1,506,120
Rune javelinRune javelin5Rare900
Rune platebodyRune platebody1Uncommon37,081
Rune platebodyRune platebody15–25 (noted)Rare556,215–927,025
Shield left halfShield left half1Rare65,249
Dragon helmDragon helm1Uncommon58,704
Rune arrowheads 5Rune arrowheads113–137Common22,148–26,852
Onyx bolts 5Onyx bolts135–165Very rare1,050,570–1,284,030
Chaos talismanChaos talisman1Rare1,803
Nature talismanNature talisman1Rare1,724
Water talismanWater talisman65–82 (noted)Rare430,235–542,758
Earth talismanEarth talisman65–82 (noted)Rare133,640–168,592
Fire talismanFire talisman25–35 (noted)Rare39,600–55,440
Raw lobsterRaw lobster135–165 (noted)Common19,845–24,255
Raw sharkRaw shark225–275 (noted)Uncommon336,825–411,675
Big bonesBig bones72–90 (noted)Uncommon28,368–35,460
Dragon bonesDragon bones180–220 (noted)Rare277,560–339,240
CoalCoal200–1,100 (noted)Uncommon32,000–176,000
Gold oreGold ore90–110 (noted)Common14,400–17,600
Adamantite oreAdamantite ore180–220 (noted)Uncommon239,760–293,040
Adamant barAdamant bar14–16 (noted)Common43,932–50,208
Adamant barAdamant bar135–165 (noted)Rare423,630–517,770
Runite oreRunite ore90–110 (noted)Rare994,140–1,215,060
Rune barRune bar(noted)Common41,415
Rune barRune bar45–55 (noted)Rare621,225–759,275
Grimy torstolGrimy torstol90–110 (noted)Uncommon434,610–531,190
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon314,730–384,670
Super restore (4)Super restore (4)45–55 (noted)Uncommon270,945–331,155
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon241,065–294,635
Lantadyme seed 5Lantadyme seed14–16Uncommon14,742–16,848
Dwarf weed seed 5Dwarf weed seed14–16Uncommon13,272–15,168
Magic seed 5Magic seed4Uncommon493,252
Palm tree seed 5Palm tree seed10Rare2,094,820
FlaxFlax450–550 (noted)Common7,650–9,350
Molten glassMolten glass45–55 (noted)Common11,835–14,465
Soft claySoft clay450–550 (noted)Uncommon314,550–384,450
Yew logsYew logs68–82Uncommon12,920–15,580
Yew logsYew logs675–825 (noted)Rare128,250–156,750
Teak plankTeak plank45–55 (noted)Uncommon52,155–63,745
Mahogany plankMahogany plank270–330 (noted)Rare664,470–812,130
Blurberry specialBlurberry special1Uncommon1,820
Vecna skullVecna skull1Very rare*206,092
Hazelmere's signet ringHazelmere's signet ring1Very rare*69,592,674
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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