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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
BonesBones1Always385

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 rune1–39Common25–975
Earth runeEarth rune1–40Common20–800
Air talismanAir talisman1Uncommon346
Mind talismanMind talisman1Uncommon264
Fire talismanFire talisman1Uncommon1,330
Cosmic talismanCosmic talisman1Rare644
Body talismanBody talisman1Rare267
Water talismanWater talisman1Uncommon6,836
Earth talismanEarth talisman1Uncommon1,709
Nature talismanNature talisman1Rare1,769
Chaos talismanChaos talisman1Uncommon2,395
Steel platebodySteel platebody1Common2,065
Black clawBlack claw1Common[1]3,514
Off-hand black clawOff-hand black claw1Common[1]1,406
Black platebodyBlack platebody1Common1,882
Mithril hatchetMithril hatchet1Common1,285
Rock-shell glovesRock-shell gloves1Uncommon5,782
Rock-shell bootsRock-shell boots1Uncommon4,819
Black warhammerBlack warhammer1Uncommon1,543
Off-hand black warhammerOff-hand black warhammer1Uncommon610
Adamant longswordAdamant longsword1Uncommon4,948
Adamant warhammerAdamant warhammer1Rare2,728
Poison ivy seed 5Poison ivy seed1Uncommon94
Belladonna seed 5Belladonna seed1Uncommon801
Guam seed 5Guam seed1Uncommon22
Marrentill seed 5Marrentill seed1Uncommon11
Tarromin seed 5Tarromin seed1Uncommon18
Harralander seed 5Harralander seed1Uncommon33
Toadflax seed 5Toadflax seed1Uncommon2,732
Ranarr seed 5Ranarr seed1Rare1,347
Irit seed 5Irit seed1Rare720
Avantoe seed 5Avantoe seed1Rare280
Snapdragon seed 5Snapdragon seed1Rare454
Cadantine seed 5Cadantine seed1Rare3,474
Lantadyme seed 5Lantadyme seed1Rare1,011
Kwuarm seed 5Kwuarm seed1Rare5,604
Dwarf weed seed 5Dwarf weed seed1Very rare761
Torstol seed 5Torstol seed1Very rare1,888
Grimy guamGrimy guam1Uncommon221
Grimy marrentillGrimy marrentill1Uncommon246
Grimy tarrominGrimy tarromin1Uncommon29
Grimy harralanderGrimy harralander1Uncommon100
Grimy ranarrGrimy ranarr1Rare3,740
Grimy iritGrimy irit1Rare3,212
Grimy avantoeGrimy avantoe1Rare2,091
Grimy kwuarmGrimy kwuarm1Rare5,172
Grimy cadantineGrimy cadantine1Rare4,253
Grimy lantadymeGrimy lantadyme1Rare4,131
Grimy dwarf weedGrimy dwarf weed1Rare2,708
Coins 100Coins23–137Common23–137
Raw lobsterRaw lobster1Common157
Raw bassRaw bass1Common339
TinderboxTinderbox1Common273
CasketCasket1Rare3,189
Rock-shell splinterRock-shell splinter1Uncommon2,209
Rock-shell chunkRock-shell chunk1Rare1,799
Rock-shell shardRock-shell shard1Rare6,474
  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 sapphire1Common1,026
Uncut emeraldUncut emerald1Common2,124
Uncut rubyUncut ruby1Common2,101
Uncut diamondUncut diamond1Common4,084
Uncut diamondUncut diamond45–55 (noted)Rare183,780–224,620
Loop half of a keyLoop half of a key1Common17,268
Tooth half of a keyTooth half of a key1Common22,064
Uncut dragonstoneUncut dragonstone1Uncommon12,709
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare571,905–698,995
Dragon longswordDragon longsword1Common56,159
Dragon spearDragon spear1Rare36,185
BattlestaffBattlestaff180–220 (noted)Rare1,168,020–1,427,580
Rune javelinRune javelin5Rare855
Rune platebodyRune platebody1Uncommon37,392
Rune platebodyRune platebody15–25 (noted)Rare560,880–934,800
Shield left halfShield left half1Rare64,976
Dragon helmDragon helm1Uncommon58,446
Rune arrowheads 5Rune arrowheads113–137Common25,312–30,688
Onyx bolts 5Onyx bolts135–165Very rare1,034,775–1,264,725
Chaos talismanChaos talisman1Rare2,395
Nature talismanNature talisman1Rare1,769
Water talismanWater talisman65–82 (noted)Rare444,340–560,552
Earth talismanEarth talisman65–82 (noted)Rare111,085–140,138
Fire talismanFire talisman25–35 (noted)Rare33,250–46,550
Raw lobsterRaw lobster135–165 (noted)Common21,195–25,905
Raw sharkRaw shark225–275 (noted)Uncommon269,325–329,175
Big bonesBig bones72–90 (noted)Uncommon28,080–35,100
Dragon bonesDragon bones180–220 (noted)Rare249,840–305,360
CoalCoal200–1,100 (noted)Uncommon27,800–152,900
Gold oreGold ore90–110 (noted)Common13,950–17,050
Adamantite oreAdamantite ore180–220 (noted)Uncommon227,340–277,860
Adamant barAdamant bar14–16 (noted)Common41,594–47,536
Adamant barAdamant bar135–165 (noted)Rare401,085–490,215
Runite oreRunite ore90–110 (noted)Rare947,160–1,157,640
Rune barRune bar(noted)Common40,827
Rune barRune bar45–55 (noted)Rare612,405–748,495
Grimy torstolGrimy torstol90–110 (noted)Uncommon430,560–526,240
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon336,690–411,510
Super restore (4)Super restore (4)45–55 (noted)Uncommon262,260–320,540
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon218,970–267,630
Lantadyme seed 5Lantadyme seed14–16Uncommon14,154–16,176
Dwarf weed seed 5Dwarf weed seed14–16Uncommon10,654–12,176
Magic seed 5Magic seed4Uncommon464,224
Palm tree seed 5Palm tree seed10Rare2,128,930
FlaxFlax450–550 (noted)Common7,200–8,800
Molten glassMolten glass45–55 (noted)Common12,555–15,345
Soft claySoft clay450–550 (noted)Uncommon238,950–292,050
Yew logsYew logs68–82Uncommon13,600–16,400
Yew logsYew logs675–825 (noted)Rare135,000–165,000
Teak plankTeak plank45–55 (noted)Uncommon40,590–49,610
Mahogany plankMahogany plank270–330 (noted)Rare542,970–663,630
Blurberry specialBlurberry special1Uncommon1,899
Vecna skullVecna skull1Very rare*175,503
Hazelmere's signet ringHazelmere's signet ring1Very rare*1,804,467,420
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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