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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
BonesBones1Always191

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 rune1–39Common26–1,014
Earth runeEarth rune1–40Common21–840
Air talismanAir talisman1Uncommon291
Mind talismanMind talisman1Uncommon183
Fire talismanFire talisman1Uncommon1,788
Cosmic talismanCosmic talisman1Rare339
Body talismanBody talisman1Rare298
Water talismanWater talisman1Uncommon6,850
Earth talismanEarth talisman1Uncommon1,908
Nature talismanNature talisman1Rare1,483
Chaos talismanChaos talisman1Uncommon1,530
Steel platebodySteel platebody1Common2,364
Black clawBlack claw1Common[1]2,918
Off-hand black clawOff-hand black claw1Common[1]1,266
Black platebodyBlack platebody1Common2,315
Mithril hatchetMithril hatchet1Common1,612
Rock-shell glovesRock-shell gloves1Uncommon6,478
Rock-shell bootsRock-shell boots1Uncommon6,277
Black warhammerBlack warhammer1Uncommon1,886
Off-hand black warhammerOff-hand black warhammer1Uncommon959
Adamant longswordAdamant longsword1Uncommon4,826
Adamant warhammerAdamant warhammer1Rare3,039
Poison ivy seed 5Poison ivy seed1Uncommon198
Belladonna seed 5Belladonna seed1Uncommon826
Guam seed 5Guam seed1Uncommon14
Marrentill seed 5Marrentill seed1Uncommon10
Tarromin seed 5Tarromin seed1Uncommon28
Harralander seed 5Harralander seed1Uncommon57
Toadflax seed 5Toadflax seed1Uncommon3,756
Ranarr seed 5Ranarr seed1Rare1,784
Irit seed 5Irit seed1Rare607
Avantoe seed 5Avantoe seed1Rare369
Snapdragon seed 5Snapdragon seed1Rare554
Cadantine seed 5Cadantine seed1Rare1,342
Lantadyme seed 5Lantadyme seed1Rare673
Kwuarm seed 5Kwuarm seed1Rare7,611
Dwarf weed seed 5Dwarf weed seed1Very rare696
Torstol seed 5Torstol seed1Very rare1,035
Grimy guamGrimy guam1Uncommon327
Grimy marrentillGrimy marrentill1Uncommon323
Grimy tarrominGrimy tarromin1Uncommon26
Grimy harralanderGrimy harralander1Uncommon98
Grimy ranarrGrimy ranarr1Rare2,624
Grimy iritGrimy irit1Rare3,259
Grimy avantoeGrimy avantoe1Rare1,363
Grimy kwuarmGrimy kwuarm1Rare5,413
Grimy cadantineGrimy cadantine1Rare2,699
Grimy lantadymeGrimy lantadyme1Rare2,878
Grimy dwarf weedGrimy dwarf weed1Rare1,933
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common218
Raw bassRaw bass1Common401
TinderboxTinderbox1Common282
CasketCasket1Rare2,598
Rock-shell splinterRock-shell splinter1Uncommon2,731
Rock-shell chunkRock-shell chunk1Rare2,040
Rock-shell shardRock-shell shard1Rare6,191
  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 sapphire1Common729
Uncut emeraldUncut emerald1Common1,908
Uncut rubyUncut ruby1Common1,544
Uncut diamondUncut diamond1Common3,389
Uncut diamondUncut diamond45–55 (noted)Rare152,505–186,395
Loop half of a keyLoop half of a key1Common16,604
Tooth half of a keyTooth half of a key1Common19,753
Uncut dragonstoneUncut dragonstone1Uncommon11,332
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare509,940–623,260
Dragon longswordDragon longsword1Common57,686
Dragon spearDragon spear1Rare35,245
BattlestaffBattlestaff180–220 (noted)Rare1,088,640–1,330,560
Rune javelinRune javelin5Rare860
Rune platebodyRune platebody1Uncommon37,796
Rune platebodyRune platebody15–25 (noted)Rare566,940–944,900
Shield left halfShield left half1Rare66,914
Dragon helmDragon helm1Uncommon58,598
Rune arrowheads 5Rune arrowheads113–137Common24,182–29,318
Onyx bolts 5Onyx bolts135–165Very rare1,076,490–1,315,710
Chaos talismanChaos talisman1Rare1,530
Nature talismanNature talisman1Rare1,483
Water talismanWater talisman65–82 (noted)Rare445,250–561,700
Earth talismanEarth talisman65–82 (noted)Rare124,020–156,456
Fire talismanFire talisman25–35 (noted)Rare44,700–62,580
Raw lobsterRaw lobster135–165 (noted)Common29,430–35,970
Raw sharkRaw shark225–275 (noted)Uncommon247,050–301,950
Big bonesBig bones68–82 (noted)Uncommon13,124–15,826
Dragon bonesDragon bones180–220 (noted)Rare311,940–381,260
CoalCoal200–1,100 (noted)Uncommon26,600–146,300
Gold oreGold ore90–110 (noted)Common16,920–20,680
Adamantite oreAdamantite ore180–220 (noted)Uncommon239,760–293,040
Adamant barAdamant bar14–16 (noted)Common37,366–42,704
Adamant barAdamant bar135–165 (noted)Rare360,315–440,385
Runite oreRunite ore90–110 (noted)Rare1,084,770–1,325,830
Rune barRune bar(noted)Common41,388
Rune barRune bar45–55 (noted)Rare620,820–758,780
Grimy torstolGrimy torstol90–110 (noted)Uncommon321,030–392,370
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon148,590–181,610
Super restore (4)Super restore (4)45–55 (noted)Uncommon177,255–216,645
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon173,025–211,475
Lantadyme seed 5Lantadyme seed14–16Uncommon9,422–10,768
Dwarf weed seed 5Dwarf weed seed14–16Uncommon9,744–11,136
Magic seed 5Magic seed4Uncommon389,588
Palm tree seed 5Palm tree seed10Rare1,063,600
FlaxFlax450–550 (noted)Common18,450–22,550
Molten glassMolten glass45–55 (noted)Common10,665–13,035
Soft claySoft clay450–550 (noted)Uncommon188,100–229,900
Yew logsYew logs68–82 (noted)Uncommon12,580–15,170
Yew logsYew logs675–825 (noted)Rare124,875–152,625
Teak plankTeak plank45–55 (noted)Uncommon35,055–42,845
Mahogany plankMahogany plank270–330 (noted)Rare378,540–462,660
Blurberry SpecialBlurberry Special1Uncommon4,408
Vecna skullVecna skull1Very rare*339,059
Hazelmere's signet ringHazelmere's signet ring1Very rare*1,967,717,757
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 rare15,869

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.