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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
BonesBones1Always274

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 rune1–39Common24–936
Earth runeEarth rune1–40Common21–840
Air talismanAir talisman1Uncommon406
Mind talismanMind talisman1Uncommon221
Fire talismanFire talisman1Uncommon1,014
Cosmic talismanCosmic talisman1Rare613
Body talismanBody talisman1Rare321
Water talismanWater talisman1Uncommon5,271
Earth talismanEarth talisman1Uncommon1,390
Nature talismanNature talisman1Rare1,472
Chaos talismanChaos talisman1Uncommon1,516
Steel platebodySteel platebody1Common2,005
Black clawBlack claw1Common[1]3,807
Off-hand black clawOff-hand black claw1Common[1]1,458
Black platebodyBlack platebody1Common1,881
Mithril hatchetMithril hatchet1Common1,649
Rock-shell glovesRock-shell gloves1Uncommon5,351
Rock-shell bootsRock-shell boots1Uncommon4,672
Black warhammerBlack warhammer1Uncommon1,655
Off-hand black warhammerOff-hand black warhammer1Uncommon662
Adamant longswordAdamant longsword1Uncommon5,342
Adamant warhammerAdamant warhammer1Rare2,978
Poison ivy seed 5Poison ivy seed1Uncommon102
Belladonna seed 5Belladonna seed1Uncommon929
Guam seed 5Guam seed1Uncommon19
Marrentill seed 5Marrentill seed1Uncommon10
Tarromin seed 5Tarromin seed1Uncommon16
Harralander seed 5Harralander seed1Uncommon25
Toadflax seed 5Toadflax seed1Uncommon3,704
Ranarr seed 5Ranarr seed1Rare943
Irit seed 5Irit seed1Rare464
Avantoe seed 5Avantoe seed1Rare327
Snapdragon seed 5Snapdragon seed1Rare461
Cadantine seed 5Cadantine seed1Rare2,086
Lantadyme seed 5Lantadyme seed1Rare755
Kwuarm seed 5Kwuarm seed1Rare6,185
Dwarf weed seed 5Dwarf weed seed1Very rare679
Torstol seed 5Torstol seed1Very rare1,970
Grimy guamGrimy guam1Uncommon268
Grimy marrentillGrimy marrentill1Uncommon202
Grimy tarrominGrimy tarromin1Uncommon28
Grimy harralanderGrimy harralander1Uncommon82
Grimy ranarrGrimy ranarr1Rare3,339
Grimy iritGrimy irit1Rare3,052
Grimy avantoeGrimy avantoe1Rare1,819
Grimy kwuarmGrimy kwuarm1Rare4,948
Grimy cadantineGrimy cadantine1Rare3,657
Grimy lantadymeGrimy lantadyme1Rare3,032
Grimy dwarf weedGrimy dwarf weed1Rare2,580
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common172
Raw bassRaw bass1Common297
TinderboxTinderbox1Common227
CasketCasket1Rare3,580
Rock-shell splinterRock-shell splinter1Uncommon2,285
Rock-shell chunkRock-shell chunk1Rare1,750
Rock-shell shardRock-shell shard1Rare6,323
  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 sapphire1Common976
Uncut emeraldUncut emerald1Common1,926
Uncut rubyUncut ruby1Common2,066
Uncut diamondUncut diamond1Common3,718
Uncut diamondUncut diamond45–55 (noted)Rare167,310–204,490
Loop half of a keyLoop half of a key1Common17,625
Tooth half of a keyTooth half of a key1Common22,175
Uncut dragonstoneUncut dragonstone1Uncommon11,266
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare506,970–619,630
Dragon longswordDragon longsword1Common56,684
Dragon spearDragon spear1Rare39,869
BattlestaffBattlestaff180–220 (noted)Rare1,158,120–1,415,480
Rune javelinRune javelin5Rare930
Rune platebodyRune platebody1Uncommon37,652
Rune platebodyRune platebody15–25 (noted)Rare564,780–941,300
Shield left halfShield left half1Rare64,941
Dragon helmDragon helm1Uncommon58,819
Rune arrowheads 5Rune arrowheads113–137Common37,177–45,073
Onyx bolts 5Onyx bolts135–165Very rare1,068,795–1,306,305
Chaos talismanChaos talisman1Rare1,516
Nature talismanNature talisman1Rare1,472
Water talismanWater talisman65–82 (noted)Rare342,615–432,222
Earth talismanEarth talisman65–82 (noted)Rare90,350–113,980
Fire talismanFire talisman25–35 (noted)Rare25,350–35,490
Raw lobsterRaw lobster135–165 (noted)Common23,220–28,380
Raw sharkRaw shark225–275 (noted)Uncommon265,725–324,775
Big bonesBig bones72–90 (noted)Uncommon17,208–21,510
Dragon bonesDragon bones180–220 (noted)Rare260,820–318,780
CoalCoal200–1,100 (noted)Uncommon26,000–143,000
Gold oreGold ore90–110 (noted)Common17,370–21,230
Adamantite oreAdamantite ore180–220 (noted)Uncommon257,580–314,820
Adamant barAdamant bar14–16 (noted)Common41,524–47,456
Adamant barAdamant bar135–165 (noted)Rare400,410–489,390
Runite oreRunite ore90–110 (noted)Rare1,042,650–1,274,350
Rune barRune bar(noted)Common41,661
Rune barRune bar45–55 (noted)Rare624,915–763,785
Grimy torstolGrimy torstol90–110 (noted)Uncommon357,300–436,700
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon286,830–350,570
Super restore (4)Super restore (4)45–55 (noted)Uncommon273,240–333,960
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon203,850–249,150
Lantadyme seed 5Lantadyme seed14–16Uncommon10,570–12,080
Dwarf weed seed 5Dwarf weed seed14–16Uncommon9,506–10,864
Magic seed 5Magic seed4Uncommon416,604
Palm tree seed 5Palm tree seed10Rare1,808,290
FlaxFlax450–550 (noted)Common13,050–15,950
Molten glassMolten glass45–55 (noted)Common13,455–16,445
Soft claySoft clay450–550 (noted)Uncommon250,200–305,800
Yew logsYew logs68–82Uncommon13,736–16,564
Yew logsYew logs675–825 (noted)Rare136,350–166,650
Teak plankTeak plank45–55 (noted)Uncommon34,245–41,855
Mahogany plankMahogany plank270–330 (noted)Rare483,300–590,700
Blurberry specialBlurberry special1Uncommon1,899
Vecna skullVecna skull1Very rare*173,827
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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