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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

Use the middle south entrance just east of the wizard who teleports players to the Abyss. This is labelled entrance number 2 and goes directly to the giant rock crabs.

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
BonesBones1Always163

Runes/TalismansEdit

Item Quantity Rarity GE price
Water runeWater rune1–39Common13–507
Earth runeEarth rune1–40Common11–440
Air talismanAir talisman1Uncommon214
Mind talismanMind talisman1Uncommon262
Fire talismanFire talisman1Uncommon1,619
Cosmic talismanCosmic talisman1Rare461
Body talismanBody talisman1Rare287
Water talismanWater talisman1Uncommon6,722
Earth talismanEarth talisman1Uncommon1,705
Nature talismanNature talisman1Rare870
Chaos talismanChaos talisman1Uncommon1,093

Weaponry/ArmourEdit

Item Quantity Rarity GE price
Steel platebodySteel platebody1Common2,100
Black clawBlack claw1Common[1]439
Off-hand black clawOff-hand black claw1Common[1]607
Black platebodyBlack platebody1Common2,120
Mithril hatchetMithril hatchet1Common1,028
Rock-shell glovesRock-shell gloves1Uncommon21,183
Rock-shell bootsRock-shell boots1Uncommon7,207
Black warhammerBlack warhammer1Uncommon898
Off-hand black warhammerOff-hand black warhammer1Uncommon369
Adamant longswordAdamant longsword1Uncommon4,703
Adamant warhammerAdamant warhammer1Rare2,977
  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
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SeedsEdit

Item Quantity Rarity GE price
Poison ivy seed 5Poison ivy seed1Uncommon42
Belladonna seed 5Belladonna seed1Uncommon566
Guam seed 5Guam seed1Uncommon11
Marrentill seed 5Marrentill seed1Uncommon8
Tarromin seed 5Tarromin seed1Uncommon17
Harralander seed 5Harralander seed1Uncommon28
Toadflax seed 5Toadflax seed1Uncommon414
Ranarr seed 5Ranarr seed1Rare1,129
Irit seed 5Irit seed1Rare154
Avantoe seed 5Avantoe seed1Rare350
Snapdragon seed 5Snapdragon seed1Rare405
Cadantine seed 5Cadantine seed1Rare2,661
Lantadyme seed 5Lantadyme seed1Rare1,296
Kwuarm seed 5Kwuarm seed1Rare3,925
Dwarf weed seed 5Dwarf weed seed1Very rare1,185
Torstol seed 5Torstol seed1Very rare3,699

HerbsEdit

Item Quantity Rarity GE price
Grimy guamGrimy guam1Uncommon138
Grimy marrentillGrimy marrentill1Uncommon154
Grimy tarrominGrimy tarromin1Uncommon39
Grimy harralanderGrimy harralander1Uncommon100
Grimy ranarrGrimy ranarr1Rare2,486
Grimy iritGrimy irit1Rare1,921
Grimy avantoeGrimy avantoe1Rare2,226
Grimy kwuarmGrimy kwuarm1Rare4,297
Grimy cadantineGrimy cadantine1Rare3,998
Grimy lantadymeGrimy lantadyme1Rare3,444
Grimy dwarf weedGrimy dwarf weed1Rare3,173

OtherEdit

Item Quantity Rarity GE price
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common106
Raw bassRaw bass1Common310
TinderboxTinderbox1Common181
CasketCasket1Rare4,562
Rock-shell splinterRock-shell splinter1Uncommon11,476
Rock-shell chunkRock-shell chunk1Rare8,583
Rock-shell shardRock-shell shard1Rare9,016
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 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 sapphire1Common916
Uncut emeraldUncut emerald1Common1,741
Uncut rubyUncut ruby1Common3,001
Uncut diamondUncut diamond1Common3,793
Uncut diamondUncut diamond45–55 (noted)Rare170,685–208,615
Loop half of a keyLoop half of a key1Common15,213
Tooth half of a keyTooth half of a key1Common27,498
Uncut dragonstoneUncut dragonstone1Uncommon12,672
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare570,240–696,960
Dragon longswordDragon longsword1Common57,834
Dragon spearDragon spear1Rare35,994
BattlestaffBattlestaff180–220 (noted)Rare1,251,900–1,530,100
Rune javelinRune javelin5Rare1,200
Rune platebodyRune platebody1Uncommon37,818
Rune platebodyRune platebody15–25 (noted)Rare567,270–945,450
Shield left halfShield left half1Rare64,876
Dragon helmDragon helm1Uncommon58,816
Rune arrowheads 5Rune arrowheads113–137Common18,080–21,920
Onyx bolts 5Onyx bolts135–165Very rare1,088,100–1,329,900
Vecna skullVecna skull1Rare75,457
Chaos talismanChaos talisman1Rare1,093
Nature talismanNature talisman1Rare870
Water talismanWater talisman65–82 (noted)Rare436,930–551,204
Earth talismanEarth talisman65–82 (noted)Rare110,825–139,810
Fire talismanFire talisman25–35 (noted)Rare40,475–56,665
Raw lobsterRaw lobster135–165 (noted)Common14,310–17,490
Raw sharkRaw shark225–275 (noted)Uncommon200,700–245,300
Big bonesBig bones79–90 (noted)Uncommon26,781–30,510
Dragon bonesDragon bones180–220 (noted)Rare357,480–436,920
CoalCoal200–1,100 (noted)Uncommon45,000–247,500
Gold oreGold ore90–110 (noted)Common12,420–15,180
Adamantite oreAdamantite ore180–220 (noted)Uncommon170,280–208,120
Adamant barAdamant bar14–16 (noted)Common38,178–43,632
Adamant barAdamant bar135–165 (noted)Rare368,145–449,955
Runite oreRunite ore90–110 (noted)Rare941,580–1,150,820
Rune barRune bar(noted)Common41,199
Rune barRune bar45–55 (noted)Rare617,985–755,315
Grimy torstolGrimy torstol90–110 (noted)Uncommon377,370–461,230
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon256,680–313,720
Super restore (4)Super restore (4)45–55 (noted)Uncommon164,790–201,410
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon138,330–169,070
Lantadyme seed 5Lantadyme seed14–16Uncommon18,144–20,736
Dwarf weed seed 5Dwarf weed seed14–16Uncommon16,590–18,960
Magic seed 5Magic seed4Uncommon282,068
Palm tree seed 5Palm tree seed10Rare812,590
FlaxFlax450–550 (noted)Common7,200–8,800
Molten glassMolten glass45–55 (noted)Common11,295–13,805
Soft claySoft clay450–550 (noted)Uncommon158,850–194,150
Yew logsYew logs68–82Uncommon13,260–15,990
Yew logsYew logs675–825 (noted)Rare131,625–160,875
Teak plankTeak plank45–55 (noted)Uncommon25,200–30,800
Mahogany plankMahogany plank270–330 (noted)Rare532,170–650,430
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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