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Giant rock crab

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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
BonesBones1Always181

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 rune1–39Common17–663
Earth runeEarth rune1–40Common14–560
Air talismanAir talisman1Uncommon260
Mind talismanMind talisman1Uncommon304
Fire talismanFire talisman1Uncommon1,456
Cosmic talismanCosmic talisman1Rare346
Body talismanBody talisman1Rare355
Water talismanWater talisman1Uncommon5,413
Earth talismanEarth talisman1Uncommon1,768
Nature talismanNature talisman1Rare1,025
Chaos talismanChaos talisman1Uncommon1,724
Steel platebodySteel platebody1Common2,054
Black clawBlack claw1Common[1]2,153
Off-hand black clawOff-hand black claw1Common[1]1,072
Black platebodyBlack platebody1Common1,745
Mithril hatchetMithril hatchet1Common1,154
Rock-shell glovesRock-shell gloves1Uncommon8,574
Rock-shell bootsRock-shell boots1Uncommon6,261
Black warhammerBlack warhammer1Uncommon1,409
Off-hand black warhammerOff-hand black warhammer1Uncommon482
Adamant longswordAdamant longsword1Uncommon4,185
Adamant warhammerAdamant warhammer1Rare2,250
Poison ivy seed 5Poison ivy seed1Uncommon58
Belladonna seed 5Belladonna seed1Uncommon349
Guam seed 5Guam seed1Uncommon23
Marrentill seed 5Marrentill seed1Uncommon21
Tarromin seed 5Tarromin seed1Uncommon32
Harralander seed 5Harralander seed1Uncommon23
Toadflax seed 5Toadflax seed1Uncommon3,339
Ranarr seed 5Ranarr seed1Rare1,920
Irit seed 5Irit seed1Rare755
Avantoe seed 5Avantoe seed1Rare740
Snapdragon seed 5Snapdragon seed1Rare808
Cadantine seed 5Cadantine seed1Rare5,262
Lantadyme seed 5Lantadyme seed1Rare2,196
Kwuarm seed 5Kwuarm seed1Rare7,278
Dwarf weed seed 5Dwarf weed seed1Very rare1,911
Torstol seed 5Torstol seed1Very rare3,811
Grimy guamGrimy guam1Uncommon193
Grimy marrentillGrimy marrentill1Uncommon198
Grimy tarrominGrimy tarromin1Uncommon37
Grimy harralanderGrimy harralander1Uncommon82
Grimy ranarrGrimy ranarr1Rare3,290
Grimy iritGrimy irit1Rare3,280
Grimy avantoeGrimy avantoe1Rare2,321
Grimy kwuarmGrimy kwuarm1Rare5,482
Grimy cadantineGrimy cadantine1Rare4,950
Grimy lantadymeGrimy lantadyme1Rare3,486
Grimy dwarf weedGrimy dwarf weed1Rare2,649
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common109
Raw bassRaw bass1Common250
TinderboxTinderbox1Common282
CasketCasket1Rare2,486
Rock-shell splinterRock-shell splinter1Uncommon9,561
Rock-shell chunkRock-shell chunk1Rare6,132
Rock-shell shardRock-shell shard1Rare7,141
  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 sapphire1Common949
Uncut emeraldUncut emerald1Common2,066
Uncut rubyUncut ruby1Common2,664
Uncut diamondUncut diamond1Common3,957
Uncut diamondUncut diamond45–55 (noted)Rare178,065–217,635
Loop half of a keyLoop half of a key1Common20,453
Tooth half of a keyTooth half of a key1Common24,058
Uncut dragonstoneUncut dragonstone1Uncommon11,470
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare516,150–630,850
Dragon longswordDragon longsword1Common55,883
Dragon spearDragon spear1Rare38,561
BattlestaffBattlestaff180–220 (noted)Rare1,225,980–1,498,420
Rune javelinRune javelin5Rare895
Rune platebodyRune platebody1Uncommon37,007
Rune platebodyRune platebody15–25 (noted)Rare555,105–925,175
Shield left halfShield left half1Rare65,245
Dragon helmDragon helm1Uncommon58,270
Rune arrowheads 5Rune arrowheads113–137Common21,131–25,619
Onyx bolts 5Onyx bolts135–165Very rare1,048,005–1,280,895
Chaos talismanChaos talisman1Rare1,724
Nature talismanNature talisman1Rare1,025
Water talismanWater talisman65–82 (noted)Rare351,845–443,866
Earth talismanEarth talisman65–82 (noted)Rare114,920–144,976
Fire talismanFire talisman25–35 (noted)Rare36,400–50,960
Raw lobsterRaw lobster135–165 (noted)Common14,715–17,985
Raw sharkRaw shark225–275 (noted)Uncommon234,225–286,275
Big bonesBig bones72–90 (noted)Uncommon26,352–32,940
Dragon bonesDragon bones180–220 (noted)Rare299,340–365,860
CoalCoal200–1,100 (noted)Uncommon35,200–193,600
Gold oreGold ore90–110 (noted)Common13,230–16,170
Adamantite oreAdamantite ore180–220 (noted)Uncommon227,160–277,640
Adamant barAdamant bar14–16 (noted)Common39,116–44,704
Adamant barAdamant bar135–165 (noted)Rare377,190–461,010
Runite oreRunite ore90–110 (noted)Rare982,710–1,201,090
Rune barRune bar(noted)Common41,706
Rune barRune bar45–55 (noted)Rare625,590–764,610
Grimy torstolGrimy torstol90–110 (noted)Uncommon373,140–456,060
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon293,130–358,270
Super restore (4)Super restore (4)45–55 (noted)Uncommon253,350–309,650
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon221,175–270,325
Lantadyme seed 5Lantadyme seed14–16Uncommon30,744–35,136
Dwarf weed seed 5Dwarf weed seed14–16Uncommon26,754–30,576
Magic seed 5Magic seed4Uncommon401,724
Palm tree seed 5Palm tree seed10Rare1,837,720
FlaxFlax450–550 (noted)Common5,400–6,600
Molten glassMolten glass45–55 (noted)Common16,470–20,130
Soft claySoft clay450–550 (noted)Uncommon179,550–219,450
Yew logsYew logs68–82Uncommon14,076–16,974
Yew logsYew logs675–825 (noted)Rare139,725–170,775
Teak plankTeak plank45–55 (noted)Uncommon35,955–43,945
Mahogany plankMahogany plank270–330 (noted)Rare595,080–727,320
Blurberry specialBlurberry special1Uncommon1,708
Vecna skullVecna skull1Very rare*64,516
Hazelmere's signet ringHazelmere's signet ring1Very rare*15,077,415
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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