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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%Edit

Item Quantity Rarity GE price
BonesBones1Always182

Runes/TalismansEdit

Item Quantity Rarity GE price
Water runeWater rune1–39Common21–819
Earth runeEarth rune1–40Common17–680
Air talismanAir talisman1Uncommon360
Mind talismanMind talisman1Uncommon293
Fire talismanFire talisman1Uncommon1,425
Cosmic talismanCosmic talisman1Rare319
Body talismanBody talisman1Rare261
Water talismanWater talisman1Uncommon5,441
Earth talismanEarth talisman1Uncommon1,719
Nature talismanNature talisman1Rare1,021
Chaos talismanChaos talisman1Uncommon1,706

Weaponry/ArmourEdit

Item Quantity Rarity GE price
Steel platebodySteel platebody1Common1,804
Black clawBlack claw1Common[1]1,677
Off-hand black clawOff-hand black claw1Common[1]989
Black platebodyBlack platebody1Common2,153
Mithril hatchetMithril hatchet1Common1,219
Rock-shell glovesRock-shell gloves1Uncommon7,219
Rock-shell bootsRock-shell boots1Uncommon4,926
Black warhammerBlack warhammer1Uncommon1,308
Off-hand black warhammerOff-hand black warhammer1Uncommon472
Adamant longswordAdamant longsword1Uncommon4,032
Adamant warhammerAdamant warhammer1Rare2,500
  1. ^ a b Main hand and off hand claws are dropped together.

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).

SeedsEdit

Item Quantity Rarity GE price
Poison ivy seed 5Poison ivy seed1Uncommon41
Belladonna seed 5Belladonna seed1Uncommon409
Guam seed 5Guam seed1Uncommon11
Marrentill seed 5Marrentill seed1Uncommon10
Tarromin seed 5Tarromin seed1Uncommon18
Harralander seed 5Harralander seed1Uncommon20
Toadflax seed 5Toadflax seed1Uncommon2,114
Ranarr seed 5Ranarr seed1Rare1,457
Irit seed 5Irit seed1Rare463
Avantoe seed 5Avantoe seed1Rare352
Snapdragon seed 5Snapdragon seed1Rare744
Cadantine seed 5Cadantine seed1Rare7,448
Lantadyme seed 5Lantadyme seed1Rare1,404
Kwuarm seed 5Kwuarm seed1Rare6,315
Dwarf weed seed 5Dwarf weed seed1Very rare1,132
Torstol seed 5Torstol seed1Very rare3,420

HerbsEdit

Item Quantity Rarity GE price
Grimy guamGrimy guam1Uncommon182
Grimy marrentillGrimy marrentill1Uncommon208
Grimy tarrominGrimy tarromin1Uncommon34
Grimy harralanderGrimy harralander1Uncommon79
Grimy ranarrGrimy ranarr1Rare2,988
Grimy iritGrimy irit1Rare3,030
Grimy avantoeGrimy avantoe1Rare2,500
Grimy kwuarmGrimy kwuarm1Rare5,487
Grimy cadantineGrimy cadantine1Rare5,204
Grimy lantadymeGrimy lantadyme1Rare3,763
Grimy dwarf weedGrimy dwarf weed1Rare2,999

OtherEdit

Item Quantity Rarity GE price
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common100
Raw bassRaw bass1Common312
TinderboxTinderbox1Common264
CasketCasket1Rare2,262
Rock-shell splinterRock-shell splinter1Uncommon10,118
Rock-shell chunkRock-shell chunk1Rare6,638
Rock-shell shardRock-shell shard1Rare6,945
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.
A ring of wealth, luck potion or collector's insignia 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 sapphire1Common946
Uncut emeraldUncut emerald1Common1,973
Uncut rubyUncut ruby1Common2,604
Uncut diamondUncut diamond1Common4,088
Uncut diamondUncut diamond45–55 (noted)Rare183,960–224,840
Loop half of a keyLoop half of a key1Common17,899
Tooth half of a keyTooth half of a key1Common24,135
Uncut dragonstoneUncut dragonstone1Uncommon11,601
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare522,045–638,055
Dragon longswordDragon longsword1Common55,246
Dragon spearDragon spear1Rare35,946
BattlestaffBattlestaff180–220 (noted)Rare1,209,600–1,478,400
Rune javelinRune javelin5Rare930
Rune platebodyRune platebody1Uncommon37,373
Rune platebodyRune platebody15–25 (noted)Rare560,595–934,325
Shield left halfShield left half1Rare63,598
Dragon helmDragon helm1Uncommon58,205
Rune arrowheads 5Rune arrowheads113–137Common18,758–22,742
Onyx bolts 5Onyx bolts135–165Very rare1,034,235–1,264,065
Vecna skullVecna skull1Very rare59,537
Chaos talismanChaos talisman1Rare1,706
Nature talismanNature talisman1Rare1,021
Water talismanWater talisman65–82 (noted)Rare353,665–446,162
Earth talismanEarth talisman65–82 (noted)Rare111,735–140,958
Fire talismanFire talisman25–35 (noted)Rare35,625–49,875
Raw lobsterRaw lobster135–165 (noted)Common13,500–16,500
Raw sharkRaw shark225–275 (noted)Uncommon249,975–305,525
Big bonesBig bones72–90 (noted)Uncommon25,128–31,410
Dragon bonesDragon bones180–220 (noted)Rare308,700–377,300
CoalCoal200–1,100 (noted)Uncommon37,200–204,600
Gold oreGold ore90–110 (noted)Common12,420–15,180
Adamantite oreAdamantite ore180–220 (noted)Uncommon193,500–236,500
Adamant barAdamant bar14–16 (noted)Common34,608–39,552
Adamant barAdamant bar135–165 (noted)Rare333,720–407,880
Runite oreRunite ore90–110 (noted)Rare975,780–1,192,620
Rune barRune bar(noted)Common41,370
Rune barRune bar45–55 (noted)Rare620,550–758,450
Grimy torstolGrimy torstol90–110 (noted)Uncommon387,000–473,000
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon332,280–406,120
Super restore (4)Super restore (4)45–55 (noted)Uncommon254,160–310,640
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon211,320–258,280
Lantadyme seed 5Lantadyme seed14–16Uncommon19,656–22,464
Dwarf weed seed 5Dwarf weed seed14–16Uncommon15,848–18,112
Magic seed 5Magic seed4Uncommon519,652
Palm tree seed 5Palm tree seed10Rare2,101,410
FlaxFlax450–550 (noted)Common4,950–6,050
Molten glassMolten glass45–55 (noted)Common10,440–12,760
Soft claySoft clay450–550 (noted)Uncommon144,900–177,100
Yew logsYew logs68–82Uncommon13,736–16,564
Yew logsYew logs675–825 (noted)Rare136,350–166,650
Teak plankTeak plank45–55 (noted)Uncommon28,170–34,430
Mahogany plankMahogany plank270–330 (noted)Rare561,330–686,070
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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