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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
BonesBones1Always229

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 rune1–39Common30–1,170
Earth runeEarth rune1–40Common25–1,000
Air talismanAir talisman1Uncommon202
Mind talismanMind talisman1Uncommon326
Fire talismanFire talisman1Uncommon1,345
Cosmic talismanCosmic talisman1Rare334
Body talismanBody talisman1Rare221
Water talismanWater talisman1Uncommon5,350
Earth talismanEarth talisman1Uncommon1,910
Nature talismanNature talisman1Rare1,077
Chaos talismanChaos talisman1Uncommon963
Steel platebodySteel platebody1Common2,070
Black clawBlack claw1Common[1]2,652
Off-hand black clawOff-hand black claw1Common[1]1,203
Black platebodyBlack platebody1Common1,874
Mithril hatchetMithril hatchet1Common1,255
Rock-shell glovesRock-shell gloves1Uncommon7,233
Rock-shell bootsRock-shell boots1Uncommon4,007
Black warhammerBlack warhammer1Uncommon1,660
Off-hand black warhammerOff-hand black warhammer1Uncommon565
Adamant longswordAdamant longsword1Uncommon4,607
Adamant warhammerAdamant warhammer1Rare2,374
Poison ivy seed 5Poison ivy seed1Uncommon77
Belladonna seed 5Belladonna seed1Uncommon379
Guam seed 5Guam seed1Uncommon28
Marrentill seed 5Marrentill seed1Uncommon25
Tarromin seed 5Tarromin seed1Uncommon31
Harralander seed 5Harralander seed1Uncommon29
Toadflax seed 5Toadflax seed1Uncommon2,745
Ranarr seed 5Ranarr seed1Rare1,448
Irit seed 5Irit seed1Rare1,082
Avantoe seed 5Avantoe seed1Rare594
Snapdragon seed 5Snapdragon seed1Rare836
Cadantine seed 5Cadantine seed1Rare4,396
Lantadyme seed 5Lantadyme seed1Rare1,111
Kwuarm seed 5Kwuarm seed1Rare7,333
Dwarf weed seed 5Dwarf weed seed1Very rare1,334
Torstol seed 5Torstol seed1Very rare2,898
Grimy guamGrimy guam1Uncommon151
Grimy marrentillGrimy marrentill1Uncommon176
Grimy tarrominGrimy tarromin1Uncommon33
Grimy harralanderGrimy harralander1Uncommon79
Grimy ranarrGrimy ranarr1Rare3,387
Grimy iritGrimy irit1Rare3,253
Grimy avantoeGrimy avantoe1Rare2,256
Grimy kwuarmGrimy kwuarm1Rare5,426
Grimy cadantineGrimy cadantine1Rare4,964
Grimy lantadymeGrimy lantadyme1Rare3,744
Grimy dwarf weedGrimy dwarf weed1Rare2,629
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common146
Raw bassRaw bass1Common314
TinderboxTinderbox1Common282
CasketCasket1Rare2,403
Rock-shell splinterRock-shell splinter1Uncommon2,026
Rock-shell chunkRock-shell chunk1Rare1,794
Rock-shell shardRock-shell shard1Rare7,334
  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 sapphire1Common968
Uncut emeraldUncut emerald1Common1,980
Uncut rubyUncut ruby1Common2,431
Uncut diamondUncut diamond1Common4,214
Uncut diamondUncut diamond45–55 (noted)Rare189,630–231,770
Loop half of a keyLoop half of a key1Common19,615
Tooth half of a keyTooth half of a key1Common23,289
Uncut dragonstoneUncut dragonstone1Uncommon11,811
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare531,495–649,605
Dragon longswordDragon longsword1Common55,268
Dragon spearDragon spear1Rare36,403
BattlestaffBattlestaff180–220 (noted)Rare1,229,580–1,502,820
Rune javelinRune javelin5Rare835
Rune platebodyRune platebody1Uncommon37,248
Rune platebodyRune platebody15–25 (noted)Rare558,720–931,200
Shield left halfShield left half1Rare73,211
Dragon helmDragon helm1Uncommon58,754
Rune arrowheads 5Rune arrowheads113–137Common17,854–21,646
Onyx bolts 5Onyx bolts135–165Very rare1,035,180–1,265,220
Chaos talismanChaos talisman1Rare963
Nature talismanNature talisman1Rare1,077
Water talismanWater talisman65–82 (noted)Rare347,750–438,700
Earth talismanEarth talisman65–82 (noted)Rare124,150–156,620
Fire talismanFire talisman25–35 (noted)Rare33,625–47,075
Raw lobsterRaw lobster135–165 (noted)Common19,710–24,090
Raw sharkRaw shark225–275 (noted)Uncommon298,800–365,200
Big bonesBig bones72–90 (noted)Uncommon27,072–33,840
Dragon bonesDragon bones180–220 (noted)Rare296,640–362,560
CoalCoal200–1,100 (noted)Uncommon33,800–185,900
Gold oreGold ore90–110 (noted)Common16,290–19,910
Adamantite oreAdamantite ore180–220 (noted)Uncommon185,940–227,260
Adamant barAdamant bar14–16 (noted)Common36,624–41,856
Adamant barAdamant bar135–165 (noted)Rare353,160–431,640
Runite oreRunite ore90–110 (noted)Rare968,220–1,183,380
Rune barRune bar(noted)Common41,034
Rune barRune bar45–55 (noted)Rare615,510–752,290
Grimy torstolGrimy torstol90–110 (noted)Uncommon391,680–478,720
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon295,560–361,240
Super restore (4)Super restore (4)45–55 (noted)Uncommon286,560–350,240
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon227,430–277,970
Lantadyme seed 5Lantadyme seed14–16Uncommon15,554–17,776
Dwarf weed seed 5Dwarf weed seed14–16Uncommon18,676–21,344
Magic seed 5Magic seed4Uncommon463,876
Palm tree seed 5Palm tree seed10Rare1,771,760
FlaxFlax450–550 (noted)Common5,850–7,150
Molten glassMolten glass45–55 (noted)Common14,355–17,545
Soft claySoft clay450–550 (noted)Uncommon189,900–232,100
Yew logsYew logs68–82Uncommon13,056–15,744
Yew logsYew logs675–825 (noted)Rare129,600–158,400
Teak plankTeak plank45–55 (noted)Uncommon39,240–47,960
Mahogany plankMahogany plank270–330 (noted)Rare587,790–718,410
Blurberry specialBlurberry special1Uncommon1,805
Vecna skullVecna skull1Very rare*290,091
Hazelmere's signet ringHazelmere's signet ring1Very rare*34,550,901
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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