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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
BonesBones1Always180

Runes/TalismansEdit

Item Quantity Rarity GE price
Water runeWater rune1–39Common16–624
Earth runeEarth rune1–40Common14–560
Air talismanAir talisman1Uncommon328
Mind talismanMind talisman1Uncommon286
Fire talismanFire talisman1Uncommon2,017
Cosmic talismanCosmic talisman1Rare350
Body talismanBody talisman1Rare498
Water talismanWater talisman1Uncommon7,703
Earth talismanEarth talisman1Uncommon2,201
Nature talismanNature talisman1Rare1,220
Chaos talismanChaos talisman1Uncommon1,434

Weaponry/ArmourEdit

Item Quantity Rarity GE price
Steel platebodySteel platebody1Common2,320
Black clawBlack claw1Common[1]1,421
Off-hand black clawOff-hand black claw1Common[1]908
Black platebodyBlack platebody1Common1,869
Mithril hatchetMithril hatchet1Common1,242
Rock-shell glovesRock-shell gloves1Uncommon11,372
Rock-shell bootsRock-shell boots1Uncommon7,455
Black warhammerBlack warhammer1Uncommon1,288
Off-hand black warhammerOff-hand black warhammer1Uncommon423
Adamant longswordAdamant longsword1Uncommon3,799
Adamant warhammerAdamant warhammer1Rare2,493
  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 to be enabled)

SeedsEdit

Item Quantity Rarity GE price
Poison ivy seed 5Poison ivy seed1Uncommon65
Belladonna seed 5Belladonna seed1Uncommon386
Guam seed 5Guam seed1Uncommon12
Marrentill seed 5Marrentill seed1Uncommon11
Tarromin seed 5Tarromin seed1Uncommon20
Harralander seed 5Harralander seed1Uncommon20
Toadflax seed 5Toadflax seed1Uncommon1,200
Ranarr seed 5Ranarr seed1Rare893
Irit seed 5Irit seed1Rare306
Avantoe seed 5Avantoe seed1Rare265
Snapdragon seed 5Snapdragon seed1Rare436
Cadantine seed 5Cadantine seed1Rare7,019
Lantadyme seed 5Lantadyme seed1Rare700
Kwuarm seed 5Kwuarm seed1Rare5,331
Dwarf weed seed 5Dwarf weed seed1Very rare635
Torstol seed 5Torstol seed1Very rare2,140

HerbsEdit

Item Quantity Rarity GE price
Grimy guamGrimy guam1Uncommon135
Grimy marrentillGrimy marrentill1Uncommon198
Grimy tarrominGrimy tarromin1Uncommon32
Grimy harralanderGrimy harralander1Uncommon94
Grimy ranarrGrimy ranarr1Rare2,957
Grimy iritGrimy irit1Rare4,327
Grimy avantoeGrimy avantoe1Rare3,071
Grimy kwuarmGrimy kwuarm1Rare6,627
Grimy cadantineGrimy cadantine1Rare6,549
Grimy lantadymeGrimy lantadyme1Rare4,259
Grimy dwarf weedGrimy dwarf weed1Rare3,614

OtherEdit

Item Quantity Rarity GE price
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common103
Raw bassRaw bass1Common271
TinderboxTinderbox1Common285
CasketCasket1Rare1,912
Rock-shell splinterRock-shell splinter1Uncommon10,799
Rock-shell chunkRock-shell chunk1Rare7,243
Rock-shell shardRock-shell shard1Rare7,475
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 sapphire1Common990
Uncut emeraldUncut emerald1Common2,022
Uncut rubyUncut ruby1Common3,055
Uncut diamondUncut diamond1Common4,862
Uncut diamondUncut diamond45–55 (noted)Rare218,790–267,410
Loop half of a keyLoop half of a key1Common18,748
Tooth half of a keyTooth half of a key1Common24,776
Uncut dragonstoneUncut dragonstone1Uncommon13,462
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare605,790–740,410
Dragon longswordDragon longsword1Common56,746
Dragon spearDragon spear1Rare37,519
BattlestaffBattlestaff180–220 (noted)Rare1,238,580–1,513,820
Rune javelinRune javelin5Rare915
Rune platebodyRune platebody1Uncommon37,427
Rune platebodyRune platebody15–25 (noted)Rare561,405–935,675
Shield left halfShield left half1Rare63,761
Dragon helmDragon helm1Uncommon58,567
Rune arrowheads 5Rune arrowheads113–137Common22,035–26,715
Onyx bolts 5Onyx bolts135–165Very rare1,047,870–1,280,730
Vecna skullVecna skull1Very rare72,324
Chaos talismanChaos talisman1Rare1,434
Nature talismanNature talisman1Rare1,220
Water talismanWater talisman65–82 (noted)Rare500,695–631,646
Earth talismanEarth talisman65–82 (noted)Rare143,065–180,482
Fire talismanFire talisman25–35 (noted)Rare50,425–70,595
Raw lobsterRaw lobster135–165 (noted)Common13,905–16,995
Raw sharkRaw shark225–275 (noted)Uncommon252,675–308,825
Big bonesBig bones72–90 (noted)Uncommon26,856–33,570
Dragon bonesDragon bones180–220 (noted)Rare307,980–376,420
CoalCoal200–1,100 (noted)Uncommon35,800–196,900
Gold oreGold ore90–110 (noted)Common12,690–15,510
Adamantite oreAdamantite ore180–220 (noted)Uncommon229,140–280,060
Adamant barAdamant bar14–16 (noted)Common39,928–45,632
Adamant barAdamant bar135–165 (noted)Rare385,020–470,580
Runite oreRunite ore90–110 (noted)Rare995,040–1,216,160
Rune barRune bar(noted)Common41,688
Rune barRune bar45–55 (noted)Rare625,320–764,280
Grimy torstolGrimy torstol90–110 (noted)Uncommon451,530–551,870
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon483,570–591,030
Super restore (4)Super restore (4)45–55 (noted)Uncommon280,125–342,375
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon171,990–210,210
Lantadyme seed 5Lantadyme seed14–16Uncommon9,800–11,200
Dwarf weed seed 5Dwarf weed seed14–16Uncommon8,890–10,160
Magic seed 5Magic seed4Uncommon392,852
Palm tree seed 5Palm tree seed10Rare1,639,030
FlaxFlax450–550 (noted)Common4,500–5,500
Molten glassMolten glass45–55 (noted)Common10,170–12,430
Soft claySoft clay450–550 (noted)Uncommon151,200–184,800
Yew logsYew logs68–82Uncommon13,192–15,908
Yew logsYew logs675–825 (noted)Rare130,950–160,050
Teak plankTeak plank45–55 (noted)Uncommon39,150–47,850
Mahogany plankMahogany plank270–330 (noted)Rare643,410–786,390
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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