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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
BonesBones1Always309

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 rune1–40Common20–800
Air talismanAir talisman1Uncommon391
Mind talismanMind talisman1Uncommon185
Fire talismanFire talisman1Uncommon1,856
Cosmic talismanCosmic talisman1Rare436
Body talismanBody talisman1Rare248
Water talismanWater talisman1Uncommon7,253
Earth talismanEarth talisman1Uncommon1,848
Nature talismanNature talisman1Rare1,558
Chaos talismanChaos talisman1Uncommon1,196
Steel platebodySteel platebody1Common3,622
Black clawBlack claw1Common[1]3,797
Off-hand black clawOff-hand black claw1Common[1]1,504
Black platebodyBlack platebody1Common2,192
Mithril hatchetMithril hatchet1Common1,809
Rock-shell glovesRock-shell gloves1Uncommon4,865
Rock-shell bootsRock-shell boots1Uncommon4,989
Black warhammerBlack warhammer1Uncommon1,709
Off-hand black warhammerOff-hand black warhammer1Uncommon850
Adamant longswordAdamant longsword1Uncommon5,351
Adamant warhammerAdamant warhammer1Rare3,112
Poison ivy seed 5Poison ivy seed1Uncommon186
Belladonna seed 5Belladonna seed1Uncommon449
Guam seed 5Guam seed1Uncommon14
Marrentill seed 5Marrentill seed1Uncommon17
Tarromin seed 5Tarromin seed1Uncommon25
Harralander seed 5Harralander seed1Uncommon32
Toadflax seed 5Toadflax seed1Uncommon2,812
Ranarr seed 5Ranarr seed1Rare1,234
Irit seed 5Irit seed1Rare778
Avantoe seed 5Avantoe seed1Rare384
Snapdragon seed 5Snapdragon seed1Rare480
Cadantine seed 5Cadantine seed1Rare1,470
Lantadyme seed 5Lantadyme seed1Rare620
Kwuarm seed 5Kwuarm seed1Rare6,635
Dwarf weed seed 5Dwarf weed seed1Very rare684
Torstol seed 5Torstol seed1Very rare1,470
Grimy guamGrimy guam1Uncommon303
Grimy marrentillGrimy marrentill1Uncommon429
Grimy tarrominGrimy tarromin1Uncommon34
Grimy harralanderGrimy harralander1Uncommon104
Grimy ranarrGrimy ranarr1Rare2,732
Grimy iritGrimy irit1Rare3,856
Grimy avantoeGrimy avantoe1Rare1,781
Grimy kwuarmGrimy kwuarm1Rare5,701
Grimy cadantineGrimy cadantine1Rare3,588
Grimy lantadymeGrimy lantadyme1Rare3,691
Grimy dwarf weedGrimy dwarf weed1Rare2,627
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common320
Raw bassRaw bass1Common370
TinderboxTinderbox1Common254
CasketCasket1Rare4,006
Rock-shell splinterRock-shell splinter1Uncommon2,504
Rock-shell chunkRock-shell chunk1Rare1,981
Rock-shell shardRock-shell shard1Rare6,288
  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 sapphire1Common1,072
Uncut emeraldUncut emerald1Common2,361
Uncut rubyUncut ruby1Common2,095
Uncut diamondUncut diamond1Common3,830
Uncut diamondUncut diamond45–55 (noted)Rare172,350–210,650
Loop half of a keyLoop half of a key1Common18,754
Tooth half of a keyTooth half of a key1Common23,334
Uncut dragonstoneUncut dragonstone1Uncommon12,182
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare548,190–670,010
Dragon longswordDragon longsword1Common57,710
Dragon spearDragon spear1Rare38,868
BattlestaffBattlestaff180–220 (noted)Rare1,082,880–1,323,520
Rune javelinRune javelin5Rare810
Rune platebodyRune platebody1Uncommon37,614
Rune platebodyRune platebody15–25 (noted)Rare564,210–940,350
Shield left halfShield left half1Rare64,911
Dragon helmDragon helm1Uncommon58,873
Rune arrowheads 5Rune arrowheads113–137Common31,188–37,812
Onyx bolts 5Onyx bolts135–165Very rare1,068,660–1,306,140
Chaos talismanChaos talisman1Rare1,196
Nature talismanNature talisman1Rare1,558
Water talismanWater talisman65–82 (noted)Rare471,445–594,746
Earth talismanEarth talisman65–82 (noted)Rare120,120–151,536
Fire talismanFire talisman25–35 (noted)Rare46,400–64,960
Raw lobsterRaw lobster135–165 (noted)Common43,200–52,800
Raw sharkRaw shark225–275 (noted)Uncommon345,600–422,400
Big bonesBig bones72–90 (noted)Uncommon18,864–23,580
Dragon bonesDragon bones180–220 (noted)Rare342,540–418,660
CoalCoal200–1,100 (noted)Uncommon28,200–155,100
Gold oreGold ore90–110 (noted)Common15,660–19,140
Adamantite oreAdamantite ore180–220 (noted)Uncommon214,200–261,800
Adamant barAdamant bar14–16 (noted)Common47,824–54,656
Adamant barAdamant bar135–165 (noted)Rare461,160–563,640
Runite oreRunite ore90–110 (noted)Rare1,014,390–1,239,810
Rune barRune bar(noted)Common41,835
Rune barRune bar45–55 (noted)Rare627,525–766,975
Grimy torstolGrimy torstol90–110 (noted)Uncommon377,550–461,450
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon243,630–297,770
Super restore (4)Super restore (4)45–55 (noted)Uncommon235,260–287,540
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon175,050–213,950
Lantadyme seed 5Lantadyme seed14–16Uncommon8,680–9,920
Dwarf weed seed 5Dwarf weed seed14–16Uncommon9,576–10,944
Magic seed 5Magic seed4Uncommon407,776
Palm tree seed 5Palm tree seed10Rare1,820,420
FlaxFlax450–550 (noted)Common35,100–42,900
Molten glassMolten glass45–55 (noted)Common14,445–17,655
Soft claySoft clay450–550 (noted)Uncommon220,500–269,500
Yew logsYew logs68–82Uncommon13,328–16,072
Yew logsYew logs675–825 (noted)Rare132,300–161,700
Teak plankTeak plank45–55 (noted)Uncommon44,280–54,120
Mahogany plankMahogany plank270–330 (noted)Rare504,630–616,770
Blurberry specialBlurberry special1Uncommon2,169
Vecna skullVecna skull1Very rare*254,248
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

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.