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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% dropsEdit

Item Quantity Rarity GE price
BonesBones1Always247

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 rune1–39Common18–702
Earth runeEarth rune1–40Common21–840
Air talismanAir talisman1Uncommon215
Mind talismanMind talisman1Uncommon284
Fire talismanFire talisman1Uncommon1,338
Cosmic talismanCosmic talisman1Rare454
Body talismanBody talisman1Rare260
Water talismanWater talisman1Uncommon5,385
Earth talismanEarth talisman1Uncommon1,924
Nature talismanNature talisman1Rare897
Chaos talismanChaos talisman1Uncommon1,311
Steel platebodySteel platebody1Common1,885
Black clawBlack claw1Common[1]2,347
Off-hand black clawOff-hand black claw1Common[1]1,115
Black platebodyBlack platebody1Common2,242
Mithril hatchetMithril hatchet1Common1,342
Rock-shell glovesRock-shell gloves1Uncommon8,497
Rock-shell bootsRock-shell boots1Uncommon3,297
Black warhammerBlack warhammer1Uncommon1,578
Off-hand black warhammerOff-hand black warhammer1Uncommon528
Adamant longswordAdamant longsword1Uncommon4,566
Adamant warhammerAdamant warhammer1Rare2,407
Poison ivy seed 5Poison ivy seed1Uncommon67
Belladonna seed 5Belladonna seed1Uncommon319
Guam seed 5Guam seed1Uncommon21
Marrentill seed 5Marrentill seed1Uncommon32
Tarromin seed 5Tarromin seed1Uncommon44
Harralander seed 5Harralander seed1Uncommon23
Toadflax seed 5Toadflax seed1Uncommon2,980
Ranarr seed 5Ranarr seed1Rare1,322
Irit seed 5Irit seed1Rare673
Avantoe seed 5Avantoe seed1Rare646
Snapdragon seed 5Snapdragon seed1Rare899
Cadantine seed 5Cadantine seed1Rare6,108
Lantadyme seed 5Lantadyme seed1Rare1,606
Kwuarm seed 5Kwuarm seed1Rare7,064
Dwarf weed seed 5Dwarf weed seed1Very rare1,197
Torstol seed 5Torstol seed1Very rare3,182
Grimy guamGrimy guam1Uncommon122
Grimy marrentillGrimy marrentill1Uncommon158
Grimy tarrominGrimy tarromin1Uncommon32
Grimy harralanderGrimy harralander1Uncommon80
Grimy ranarrGrimy ranarr1Rare3,163
Grimy iritGrimy irit1Rare3,052
Grimy avantoeGrimy avantoe1Rare2,277
Grimy kwuarmGrimy kwuarm1Rare5,199
Grimy cadantineGrimy cadantine1Rare4,865
Grimy lantadymeGrimy lantadyme1Rare3,704
Grimy dwarf weedGrimy dwarf weed1Rare2,642
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common143
Raw bassRaw bass1Common305
TinderboxTinderbox1Common303
CasketCasket1Rare2,585
Rock-shell splinterRock-shell splinter1Uncommon1,980
Rock-shell chunkRock-shell chunk1Rare1,809
Rock-shell shardRock-shell shard1Rare7,481
  1. ^ a b Main hand and off hand claws are dropped together.

Tertiary dropsEdit

Item Quantity Rarity GE price
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.
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 1000Coins250–500; 3,000Common250–3,000
Uncut sapphireUncut sapphire1Common905
Uncut emeraldUncut emerald1Common1,854
Uncut rubyUncut ruby1Common2,469
Uncut diamondUncut diamond1Common4,000
Uncut diamondUncut diamond45–55 (noted)Rare180,000–220,000
Loop half of a keyLoop half of a key1Common20,310
Tooth half of a keyTooth half of a key1Common23,101
Uncut dragonstoneUncut dragonstone1Uncommon11,335
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare510,075–623,425
Dragon longswordDragon longsword1Common56,018
Dragon spearDragon spear1Rare35,239
BattlestaffBattlestaff180–220 (noted)Rare1,228,860–1,501,940
Rune javelinRune javelin5Rare920
Rune platebodyRune platebody1Uncommon37,306
Rune platebodyRune platebody15–25 (noted)Rare559,590–932,650
Shield left halfShield left half1Rare64,251
Dragon helmDragon helm1Uncommon58,389
Rune arrowheads 5Rune arrowheads113–137Common20,001–24,249
Onyx bolts 5Onyx bolts135–165Very rare1,046,115–1,278,585
Chaos talismanChaos talisman1Rare1,311
Nature talismanNature talisman1Rare897
Water talismanWater talisman65–82 (noted)Rare350,025–441,570
Earth talismanEarth talisman65–82 (noted)Rare125,060–157,768
Fire talismanFire talisman25–35 (noted)Rare33,450–46,830
Raw lobsterRaw lobster135–165 (noted)Common19,305–23,595
Raw sharkRaw shark225–275 (noted)Uncommon259,875–317,625
Big bonesBig bones72–90 (noted)Uncommon27,360–34,200
Dragon bonesDragon bones180–220 (noted)Rare304,740–372,460
CoalCoal200–1,100 (noted)Uncommon35,200–193,600
Gold oreGold ore90–110 (noted)Common14,310–17,490
Adamantite oreAdamantite ore180–220 (noted)Uncommon205,200–250,800
Adamant barAdamant bar14–16 (noted)Common36,862–42,128
Adamant barAdamant bar135–165 (noted)Rare355,455–434,445
Runite oreRunite ore90–110 (noted)Rare962,010–1,175,790
Rune barRune bar(noted)Common41,169
Rune barRune bar45–55 (noted)Rare617,535–754,765
Grimy torstolGrimy torstol90–110 (noted)Uncommon384,300–469,700
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon286,740–350,460
Super restore (4)Super restore (4)45–55 (noted)Uncommon264,150–322,850
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon211,320–258,280
Lantadyme seed 5Lantadyme seed14–16Uncommon22,484–25,696
Dwarf weed seed 5Dwarf weed seed14–16Uncommon16,758–19,152
Magic seed 5Magic seed4Uncommon562,396
Palm tree seed 5Palm tree seed10Rare2,341,250
FlaxFlax450–550 (noted)Common5,850–7,150
Molten glassMolten glass45–55 (noted)Common13,680–16,720
Soft claySoft clay450–550 (noted)Uncommon161,100–196,900
Yew logsYew logs68–82Uncommon13,736–16,564
Yew logsYew logs675–825 (noted)Rare136,350–166,650
Teak plankTeak plank45–55 (noted)Uncommon36,270–44,330
Mahogany plankMahogany plank270–330 (noted)Rare565,920–691,680
Blurberry specialBlurberry special1Uncommon1,792
Vecna skullVecna skull1Very rare*348,450
Hazelmere's signet ringHazelmere's signet ring1Very rare*18,309,594
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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