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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
BonesBones1Always249

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 rune1–39Common27–1,053
Earth runeEarth rune1–40Common20–800
Air talismanAir talisman1Uncommon385
Mind talismanMind talisman1Uncommon218
Fire talismanFire talisman1Uncommon1,655
Cosmic talismanCosmic talisman1Rare331
Body talismanBody talisman1Rare221
Water talismanWater talisman1Uncommon6,695
Earth talismanEarth talisman1Uncommon1,883
Nature talismanNature talisman1Rare1,183
Chaos talismanChaos talisman1Uncommon1,742
Steel platebodySteel platebody1Common2,292
Black clawBlack claw1Common[1]3,245
Off-hand black clawOff-hand black claw1Common[1]1,369
Black platebodyBlack platebody1Common2,087
Mithril hatchetMithril hatchet1Common1,722
Rock-shell glovesRock-shell gloves1Uncommon6,060
Rock-shell bootsRock-shell boots1Uncommon5,851
Black warhammerBlack warhammer1Uncommon1,857
Off-hand black warhammerOff-hand black warhammer1Uncommon943
Adamant longswordAdamant longsword1Uncommon5,055
Adamant warhammerAdamant warhammer1Rare3,158
Poison ivy seed 5Poison ivy seed1Uncommon213
Belladonna seed 5Belladonna seed1Uncommon718
Guam seed 5Guam seed1Uncommon20
Marrentill seed 5Marrentill seed1Uncommon15
Tarromin seed 5Tarromin seed1Uncommon26
Harralander seed 5Harralander seed1Uncommon59
Toadflax seed 5Toadflax seed1Uncommon3,664
Ranarr seed 5Ranarr seed1Rare1,991
Irit seed 5Irit seed1Rare611
Avantoe seed 5Avantoe seed1Rare502
Snapdragon seed 5Snapdragon seed1Rare660
Cadantine seed 5Cadantine seed1Rare1,377
Lantadyme seed 5Lantadyme seed1Rare713
Kwuarm seed 5Kwuarm seed1Rare7,526
Dwarf weed seed 5Dwarf weed seed1Very rare703
Torstol seed 5Torstol seed1Very rare1,322
Grimy guamGrimy guam1Uncommon341
Grimy marrentillGrimy marrentill1Uncommon386
Grimy tarrominGrimy tarromin1Uncommon30
Grimy harralanderGrimy harralander1Uncommon85
Grimy ranarrGrimy ranarr1Rare2,385
Grimy iritGrimy irit1Rare3,157
Grimy avantoeGrimy avantoe1Rare1,312
Grimy kwuarmGrimy kwuarm1Rare5,196
Grimy cadantineGrimy cadantine1Rare2,619
Grimy lantadymeGrimy lantadyme1Rare2,802
Grimy dwarf weedGrimy dwarf weed1Rare1,896
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common220
Raw bassRaw bass1Common382
TinderboxTinderbox1Common279
CasketCasket1Rare2,167
Rock-shell splinterRock-shell splinter1Uncommon2,629
Rock-shell chunkRock-shell chunk1Rare2,043
Rock-shell shardRock-shell shard1Rare6,063
  1. ^ a b Main hand and off hand claws are dropped together.

Tertiary dropsEdit

Item Quantity Rarity GE price
Sealed clue scroll (medium)Sealed 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 250Coins250–500Common250–500
Uncut sapphireUncut sapphire1Common861
Uncut emeraldUncut emerald1Common1,904
Uncut rubyUncut ruby1Common1,591
Uncut diamondUncut diamond1Common3,439
Uncut diamondUncut diamond45–55 (noted)Rare154,755–189,145
Loop half of a keyLoop half of a key1Common18,020
Tooth half of a keyTooth half of a key1Common21,823
Uncut dragonstoneUncut dragonstone1Uncommon11,480
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare516,600–631,400
Dragon longswordDragon longsword1Common57,594
Dragon spearDragon spear1Rare37,676
BattlestaffBattlestaff180–220 (noted)Rare1,090,620–1,332,980
Rune javelinRune javelin5Rare870
Rune platebodyRune platebody1Uncommon37,652
Rune platebodyRune platebody15–25 (noted)Rare564,780–941,300
Shield left halfShield left half1Rare64,922
Dragon helmDragon helm1Uncommon58,615
Rune arrowheads 5Rune arrowheads113–137Common28,702–34,798
Onyx bolts 5Onyx bolts135–165Very rare1,071,765–1,309,935
Chaos talismanChaos talisman1Rare1,742
Nature talismanNature talisman1Rare1,183
Water talismanWater talisman65–82 (noted)Rare435,175–548,990
Earth talismanEarth talisman65–82 (noted)Rare122,395–154,406
Fire talismanFire talisman25–35 (noted)Rare41,375–57,925
Raw lobsterRaw lobster135–165 (noted)Common29,700–36,300
Raw sharkRaw shark225–275 (noted)Uncommon255,600–312,400
Big bonesBig bones68–82 (noted)Uncommon12,988–15,662
Dragon bonesDragon bones180–220 (noted)Rare312,120–381,480
CoalCoal200–1,100 (noted)Uncommon26,400–145,200
Gold oreGold ore90–110 (noted)Common16,560–20,240
Adamantite oreAdamantite ore180–220 (noted)Uncommon226,080–276,320
Adamant barAdamant bar14–16 (noted)Common39,074–44,656
Adamant barAdamant bar135–165 (noted)Rare376,785–460,515
Runite oreRunite ore90–110 (noted)Rare1,037,160–1,267,640
Rune barRune bar(noted)Common41,565
Rune barRune bar45–55 (noted)Rare623,475–762,025
Grimy torstolGrimy torstol90–110 (noted)Uncommon318,510–389,290
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon162,360–198,440
Super restore (4)Super restore (4)45–55 (noted)Uncommon182,070–222,530
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon176,040–215,160
Lantadyme seed 5Lantadyme seed14–16Uncommon9,982–11,408
Dwarf weed seed 5Dwarf weed seed14–16Uncommon9,842–11,248
Magic seed 5Magic seed4Uncommon406,740
Palm tree seed 5Palm tree seed10Rare1,050,090
FlaxFlax450–550 (noted)Common17,550–21,450
Molten glassMolten glass45–55 (noted)Common13,050–15,950
Soft claySoft clay450–550 (noted)Uncommon206,100–251,900
Yew logsYew logs68–82 (noted)Uncommon12,852–15,498
Yew logsYew logs675–825 (noted)Rare127,575–155,925
Teak plankTeak plank45–55 (noted)Uncommon31,365–38,335
Mahogany plankMahogany plank270–330 (noted)Rare368,280–450,120
Blurberry specialBlurberry special1Uncommon3,652
Vecna skullVecna skull1Very rare*295,839
Hazelmere's signet ringHazelmere's signet ring1Very rare*1,885,212,297
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
Mimic kill tokenMimic kill token1Very rare17,873

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.