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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
BonesBones1Always186

Runes/TalismansEdit

Item Quantity Rarity GE price
Water runeWater rune1–39Common11–429
Earth runeEarth rune1–40Common10–400
Air talismanAir talisman1Uncommon179
Mind talismanMind talisman1Uncommon423
Fire talismanFire talisman1Uncommon1,634
Cosmic talismanCosmic talisman1Rare394
Body talismanBody talisman1Rare415
Water talismanWater talisman1Uncommon5,990
Earth talismanEarth talisman1Uncommon1,721
Nature talismanNature talisman1Rare903
Chaos talismanChaos talisman1Uncommon960

Weaponry/ArmourEdit

Item Quantity Rarity GE price
Steel platebodySteel platebody1Common2,016
Black clawBlack claw1Common[1]974
Off-hand black clawOff-hand black claw1Common[1]776
Black platebodyBlack platebody1Common2,368
Mithril hatchetMithril hatchet1Common1,267
Rock-shell glovesRock-shell gloves1Uncommon10,984
Rock-shell bootsRock-shell boots1Uncommon7,004
Black warhammerBlack warhammer1Uncommon1,216
Off-hand black warhammerOff-hand black warhammer1Uncommon396
Adamant longswordAdamant longsword1Uncommon4,246
Adamant warhammerAdamant warhammer1Rare3,064
  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 seed1Uncommon78
Belladonna seed 5Belladonna seed1Uncommon417
Guam seed 5Guam seed1Uncommon13
Marrentill seed 5Marrentill seed1Uncommon10
Tarromin seed 5Tarromin seed1Uncommon19
Harralander seed 5Harralander seed1Uncommon11
Toadflax seed 5Toadflax seed1Uncommon689
Ranarr seed 5Ranarr seed1Rare866
Irit seed 5Irit seed1Rare433
Avantoe seed 5Avantoe seed1Rare233
Snapdragon seed 5Snapdragon seed1Rare350
Cadantine seed 5Cadantine seed1Rare4,496
Lantadyme seed 5Lantadyme seed1Rare1,023
Kwuarm seed 5Kwuarm seed1Rare5,527
Dwarf weed seed 5Dwarf weed seed1Very rare1,013
Torstol seed 5Torstol seed1Very rare3,305

HerbsEdit

Item Quantity Rarity GE price
Grimy guamGrimy guam1Uncommon90
Grimy marrentillGrimy marrentill1Uncommon113
Grimy tarrominGrimy tarromin1Uncommon32
Grimy harralanderGrimy harralander1Uncommon75
Grimy ranarrGrimy ranarr1Rare2,330
Grimy iritGrimy irit1Rare3,568
Grimy avantoeGrimy avantoe1Rare2,502
Grimy kwuarmGrimy kwuarm1Rare5,765
Grimy cadantineGrimy cadantine1Rare5,237
Grimy lantadymeGrimy lantadyme1Rare3,416
Grimy dwarf weedGrimy dwarf weed1Rare3,489

OtherEdit

Item Quantity Rarity GE price
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common95
Raw bassRaw bass1Common254
TinderboxTinderbox1Common121
CasketCasket1Rare2,210
Rock-shell splinterRock-shell splinter1Uncommon11,232
Rock-shell chunkRock-shell chunk1Rare8,795
Rock-shell shardRock-shell shard1Rare7,920
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 sapphire1Common831
Uncut emeraldUncut emerald1Common1,675
Uncut rubyUncut ruby1Common2,986
Uncut diamondUncut diamond1Common3,994
Uncut diamondUncut diamond45–55 (noted)Rare179,730–219,670
Loop half of a keyLoop half of a key1Common16,604
Tooth half of a keyTooth half of a key1Common24,859
Uncut dragonstoneUncut dragonstone1Uncommon12,510
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare562,950–688,050
Dragon longswordDragon longsword1Common57,249
Dragon spearDragon spear1Rare35,603
BattlestaffBattlestaff180–220 (noted)Rare1,243,800–1,520,200
Rune javelinRune javelin5Rare975
Rune platebodyRune platebody1Uncommon37,390
Rune platebodyRune platebody15–25 (noted)Rare560,850–934,750
Shield left halfShield left half1Rare63,865
Dragon helmDragon helm1Uncommon58,056
Rune arrowheads 5Rune arrowheads113–137Common18,306–22,194
Onyx bolts 5Onyx bolts135–165Very rare1,096,605–1,340,295
Vecna skullVecna skull1Very rare72,619
Chaos talismanChaos talisman1Rare960
Nature talismanNature talisman1Rare903
Water talismanWater talisman65–82 (noted)Rare389,350–491,180
Earth talismanEarth talisman65–82 (noted)Rare111,865–141,122
Fire talismanFire talisman25–35 (noted)Rare40,850–57,190
Raw lobsterRaw lobster135–165 (noted)Common12,825–15,675
Raw sharkRaw shark225–275 (noted)Uncommon225,225–275,275
Big bonesBig bones72–90 (noted)Uncommon25,704–32,130
Dragon bonesDragon bones180–220 (noted)Rare315,000–385,000
CoalCoal200–1,100 (noted)Uncommon34,000–187,000
Gold oreGold ore90–110 (noted)Common11,970–14,630
Adamantite oreAdamantite ore180–220 (noted)Uncommon164,700–201,300
Adamant barAdamant bar14–16 (noted)Common33,418–38,192
Adamant barAdamant bar135–165 (noted)Rare322,245–393,855
Runite oreRunite ore90–110 (noted)Rare1,015,830–1,241,570
Rune barRune bar(noted)Common41,328
Rune barRune bar45–55 (noted)Rare619,920–757,680
Grimy torstolGrimy torstol90–110 (noted)Uncommon473,040–578,160
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon386,640–472,560
Super restore (4)Super restore (4)45–55 (noted)Uncommon270,315–330,385
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon149,490–182,710
Lantadyme seed 5Lantadyme seed14–16Uncommon14,322–16,368
Dwarf weed seed 5Dwarf weed seed14–16Uncommon14,182–16,208
Magic seed 5Magic seed4Uncommon418,836
Palm tree seed 5Palm tree seed10Rare1,173,290
FlaxFlax450–550 (noted)Common4,050–4,950
Molten glassMolten glass45–55 (noted)Common11,925–14,575
Soft claySoft clay450–550 (noted)Uncommon146,250–178,750
Yew logsYew logs68–82Uncommon12,716–15,334
Yew logsYew logs675–825 (noted)Rare126,225–154,275
Teak plankTeak plank45–55 (noted)Uncommon28,935–35,365
Mahogany plankMahogany plank270–330 (noted)Rare547,290–668,910
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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