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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

ChaosTunnels entrances

Use the middle south entrance just east of the wizard who teleports player to the Abyss. This is labelled entrance number 2 and goes directly to the giant rock crabs.

StrategyEdit

old
Due to an update, the information in this article may be out-of-date.
Reason: Evolution of combat

You can help improve this page by editing it.


Giant Rock Crabs are extremely resistant to Melee and Ranged attacks, and thus are only effectively killed using Magic.

A notably effective and economic way to kill Giant Rock Crabs is the Black Salamander, or the Polypore Staff. The Black Salamander's magic attack, and the Polypore staff's attack acts as a normal magic attack and takes advantage of their lower magic defence. Their magic defence is so low you can utilise high level defensive armour without losing much accuracy.

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.

They are most vulnerable to fire-based spells.

Mage Gear is as follows:

Note: Another useful tactic is to use (Elite) Void knight equipment, preferably with a Deflector and a good mage robe top.

If you are using ice burst or barrage the arcane stream necklace is not as important here because magic damage boost adds only to the target you click on. The other 8 targets do not receive the damage boost from it or your staff, so you would be better off using a necklace with a prayer bonus.

If using burst or barrage spells the Staff of light is recommended despite the lower mage bonus (in comparison to Master wand, or Chaotic staff) given the fact that it gives free casts; when used in conjunction with Battle Robes, it has a 50% chance of saving runes when casting. Even when this effect doesn't activate, the Battle Robes themselves have a chance to save runes, effectively adding up to a 60% chance of saving runes. The Battle robes will, however, only last for 6 hours of combat after which they will need to be recharged (270 tokens).

Provided you are going to be bursting, a Tome of frost is recommended above items that provide a higher magic bonus. This is because rock lobsters have fairly low magic defence (thus the difference in offensive magic bonus is negligible), while the tome saves an inventory space and the need for Water runes.

RetreatEdit

The Giant Rock Crab is one of few monsters in RuneScape that will retreat from battle when they become critically wounded. One way to avoid this (in the southern room in the chaos tunnels) is to kill the eastern one first (using the safespot in the picture above). Then when picking up the drop from them you will have likely alerted a few other giant rock crabs. Go back to the safespot and two should follow you there, from there kill them. While you're killing them the one you first killed should spawn but not attack (unless you go beside it). Because he spawns the other two can't get out and are trapped, so they cannot retreat. After killing the first one, don't pick up the drop and proceed to kill the second one. This means that you will not alert the one that spawned and you will have another retreat free kill. This may be repeated indefinitely in this fashion.

DropsEdit

100%Edit

  Item Quantity Rarity GE Market Price
Bones Bones 1 1 Always 337

Runes/TalismansEdit

  Item Quantity Rarity GE Market Price
Water rune Water rune 1–39 2 Common 28–1,092
Earth rune Earth rune 2–37 2 Common 28–518
Air talisman Air talisman 1 3 Uncommon 125
Mind talisman Mind talisman 1 3 Uncommon 251
Fire talisman Fire talisman 1 3 Uncommon 3,201
Cosmic talisman Cosmic talisman 1 4 Rare 1,349
Body talisman Body talisman 1 4 Rare 221
Water talisman Water talisman 1 3 Uncommon 13,268
Earth talisman Earth talisman 1 3 Uncommon 3,269
Nature talisman Nature talisman 1 4 Rare 372
Chaos talisman Chaos talisman 1 3 Uncommon 1,054

Weaponry/ArmourEdit

  Item Quantity Rarity GE Market Price
Steel platebody Steel platebody 1 2 Common 1,232
Black claw Black claw 1 3 Uncommon [1] 424
Off-hand black claw Off-hand black claw 1 3 Uncommon [1] 1,866
Black platebody Black platebody 1 2 Common 1,906
Mithril hatchet Mithril hatchet 1 2 Common 106
Rock-shell gloves Rock-shell gloves 1 3 Uncommon 12,690
Rock-shell boots Rock-shell boots 1 3 Uncommon 2,445
Black warhammer Black warhammer 1 3 Uncommon 430
Off-hand black warhammer Off-hand black warhammer 1 3 Uncommon 368
Adamant longsword Adamant longsword 1 3 Uncommon 1,457
Adamant warhammer Adamant warhammer 1 4 Rare 2,570
  1. ^ a b Main hand and off hand claws are dropped together.

CharmsEdit

Charm drop percentages
No charms Gold charm Green charm Crimson charm Blue charm

30–33%

43–46%

9–11%

10–12%

3–4%

Represents 90% confidence range, based on a sample of 2,507 kills.
3 charms are dropped at a time.

Please add to the log (only if 50 or more creatures killed).


SeedsEdit

  Item Quantity Rarity GE Market Price
Poison ivy seed 5 Poison ivy seed 1 3 Uncommon 3
Belladonna seed 5 Belladonna seed 1 3 Uncommon 97
Herb seed 5 Guam seed 1 3 Uncommon 3
Herb seed 5 Marrentill seed 1 3 Uncommon 4
Herb seed 5 Tarromin seed 1 3 Uncommon 4
Herb seed 5 Harralander seed 1 3 Uncommon 10
Herb seed 5 Toadflax seed 1 4 Rare 1,876
Herb seed 5 Ranarr seed 1 4 Rare 1,503
Herb seed 5 Irit seed 1 4 Rare 344
Herb seed 5 Avantoe seed 1 4 Rare 3,692
Herb seed 5 Snapdragon seed 1 4 Rare 2,425
Herb seed 5 Cadantine seed 1 4 Rare 966
Herb seed 5 Lantadyme seed 1 4 Rare 43,402
Herb seed 5 Dwarf weed seed 1 5 Very rare 66,144
Herb seed 5 Torstol seed 1 5 Very rare 25,317

HerbsEdit

  Item Quantity Rarity GE Market Price
Grimy guam Grimy guam 1 3 Uncommon 741
Grimy marrentill Grimy marrentill 1 3 Uncommon 72
Grimy tarromin Grimy tarromin 1 3 Uncommon 36
Grimy harralander Grimy harralander 1 3 Uncommon 183
Grimy ranarr Grimy ranarr 1 4 Rare 3,235
Grimy irit Grimy irit 1 4 Rare 2,685
Grimy avantoe Grimy avantoe 1 4 Rare 4,633
Grimy kwuarm Grimy kwuarm 1 4 Rare 4,476
Grimy cadantine Grimy cadantine 1 4 Rare 1,695
Grimy lantadyme Grimy lantadyme 1 4 Rare 10,139
Grimy dwarf weed Grimy dwarf weed 1 4 Rare 12,534

OtherEdit

  Item Quantity Rarity GE Market Price
Coins 100 Coins 27, 28, 42, 70, 137 2 Common Not sold
Raw lobster Raw lobster 1 2 Common 272
Raw bass Raw bass 1 2 Common 462
Tinderbox Tinderbox 1 2 Common 301
Casket Casket 1 4 Rare 8,889
Rock-shell splinter Rock-shell splinter 1 3 Uncommon 11,517
Rock-shell chunk Rock-shell chunk 1 4 Rare 5,545
Rock-shell shard Rock-shell shard 1 4 Rare 10,080
Clue scroll Clue scroll (medium) 1 5 Very rare Not sold
Ancient effigy Starved ancient effigy 1 5 Very rare Not sold

Rare drop table dropsEdit

This monster has access to the rare drop table.
The ring of wealth is not required to access the table.
Show/hide rare drop table
Item Quantity Rarity GE Market Price
Coins 250 Coins 250 – 450; 3,000;
9,000; 10,000; 12,000
2 Common Not sold
Uncut sapphire Uncut sapphire 1 2 Common 1,498
Uncut emerald Uncut emerald 1 2 Common 3,035
Uncut ruby Uncut ruby 1 2 Common 3,586
Uncut diamond Uncut diamond 1 3 Uncommon 7,427
Loop half of a key Loop half of a key 1 3 Uncommon 18,544
Tooth half of a key Tooth half of a key 1 3 Uncommon 42,254
Uncut dragonstone Uncut dragonstone 1 4 Rare 15,600
Dragonstone Dragonstone 1 4 Rare 10,551
Dragon dagger Dragon dagger 1 3 Uncommon 15,835
Rune battleaxe Rune battleaxe 1 4 Rare 24,260
Rune javelin Rune javelin 5 4 Rare 865
Adamant javelin Adamant javelin 20 5 Very rare 1,160
Rune 2h sword Rune 2h sword 1 5 Very rare 37,179
Rune spear Rune spear 1 5 Very rare 11,439
Dragon spear Dragon spear 1 5 Very rare 35,969
Dragon dagger Dragon dagger 50 (noted) 5 Very rare 791,750
Rune sq shield Rune sq shield 1 5 Very rare 22,275
Rune kiteshield Rune kiteshield 1 5 Very rare 31,737
Shield left half Shield left half 1 5 Very rare 64,381
Dragon helm Dragon helm 1 5 Very rare 58,739
Adamant bolts 5 Adamant bolts 200 3 Uncommon 19,400
Onyx bolts 5 Onyx bolts 150 4 Rare 1,268,250
Rune arrow 5 Rune arrow 150–200, 500 4 Rare 22,200–74,000
Battlestaff Battlestaff 200 (noted) 4 Rare 1,621,800
Air orb Air orb 1,000 (noted) 4 Rare 2,565,000
Fire orb Fire orb 1,000 (noted) 4 Rare 2,135,000
Vecna skull Vecna skull 1 5 Very rare 100,064
Water talisman Water talisman 1 3 Uncommon 13,268
Earth talisman Earth talisman 25–35 (noted) 3 Uncommon 81,725–114,415
Fire talisman Fire talisman 25–35 (noted) 3 Uncommon 80,025–112,035
Chaos talisman Chaos talisman 1 3 Uncommon 1,054
Nature talisman Nature talisman 1 3 Uncommon 372
Pure essence Pure essence 500–15,000 (noted) 3 Uncommon 9,500–285,000
Nature rune Nature rune 20–80 4 Rare 6,080–24,320
Soul rune Soul rune 20 4 Rare 3,200
Law rune Law rune 45 4 Rare 14,535
Death rune Death rune 50, 121 4 Rare 8,450–20,449
Blood rune Blood rune 50 4 Rare 15,700
Raw swordfish Raw swordfish 125–250, 1,000 (noted) 3 Uncommon 47,500–380,000
Raw shark Raw shark 250–500 (noted) 3 Uncommon 369,000–738,000
Big bones Big bones 150–500 (noted) 3 Uncommon 92,100–307,000
Coal Coal 150–7,500 (noted) 3 Uncommon 33,600–1,680,000
Adamantite ore Adamantite ore 150–800 (noted) 3 Uncommon 366,750–1,956,000
Silver ore Silver ore 100 (noted) 4 Rare 10,500
Runite ore Runite ore 100 (noted) 4 Rare 1,185,200
Adamant bar Adamant bar 1,000–7,000 (noted) 4 Rare 3,439,000–24,073,000
Rune bar Rune bar 1, 50, 150 (noted) 4 Rare 14,414–2,162,100
Clean ranarr Clean ranarr 33 (noted) 3 Uncommon 110,154
Clean toadflax Clean toadflax 25–250 (noted) 3 Uncommon 120,125–1,201,250
Clean snapdragon Clean snapdragon 30–120 (noted) 3 Uncommon 146,280–585,120
Clean torstol Clean torstol 10–100 (noted) 3 Uncommon 77,020–770,200
Saradomin brew (4) Saradomin brew (4) 250 (noted) 5 Very rare 211,750
Watermelon seed 5 Watermelon seed 3 3 Uncommon 6,360
Yew seed 5 Yew seed 1–50 4 Rare 68,499–3,424,950
Magic seed 5 Magic seed 1–7 4 Rare 161,158–1,128,106
Palm tree seed 5 Palm tree seed 10 4 Rare 1,074,350
Herb seed 5 Snapdragon seed 1 4 Rare 2,425
Herb seed 5 Torstol seed 1–31 4 Rare 25,317–784,827
Fellstalk seed 5 Fellstalk seed 2 4 Rare 2,352
Yew logs Yew logs 50–20,000 (noted) 4 Rare 24,950–9,980,000
Crystal triskelion fragment 1 Crystal triskelion fragment 1 1 5 Very rare Not sold
Crystal triskelion fragment 2 Crystal triskelion fragment 2 1 5 Very rare Not sold
Crystal triskelion fragment 3 Crystal triskelion fragment 3 1 5 Very rare Not sold
Brawling gloves (Melee) Brawling gloves (Melee) 1 5 Very rare Not sold
Brawling gloves (Magic) Brawling gloves (Magic) 1 5 Very rare Not sold
Brawling gloves (Ranged) Brawling gloves (Ranged) 1 5 Very rare Not sold
Brawling gloves (Agility) Brawling gloves (Agility) 1 5 Very rare Not sold
Brawling gloves (Cooking) Brawling gloves (Cooking) 1 5 Very rare Not sold
Brawling gloves (FM) Brawling gloves (FM) 1 5 Very rare Not sold
Brawling gloves (Fishing) Brawling gloves (Fishing) 1 5 Very rare Not sold
Brawling gloves (Hunter) Brawling gloves (Hunter) 1 5 Very rare Not sold
Brawling gloves (Mining) Brawling gloves (Mining) 1 5 Very rare Not sold
Brawling gloves (Prayer) Brawling gloves (Prayer) 1 5 Very rare Not sold
Brawling gloves (Smithing) Brawling gloves (Smithing) 1 5 Very rare Not sold
Brawling gloves (Thieving) Brawling gloves (Thieving) 1 5 Very rare Not sold
Brawling gloves (WC) Brawling gloves (WC) 1 5 Very rare Not sold

Universal dropsEdit

Universal drops are dropped by every monster outside of Daemonheim.
These drops are dropped alongside main drops.
  Item Quantity Rarity GE Market Price
Key token Key token 1 4 Rare Not 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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