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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

Steel full helm detail 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Due to an update, the information in this article may be out-of-date.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 345

Runes/TalismansEdit

  Item Quantity Rarity GE Market Price
Water rune Water rune 1–39 2 Common 29–1,131
Earth rune Earth rune 2–37 2 Common 32–592
Air talisman Air talisman 1 3 Uncommon 113
Mind talisman Mind talisman 1 3 Uncommon 258
Fire talisman Fire talisman 1 3 Uncommon 4,027
Cosmic talisman Cosmic talisman 1 4 Rare 2,202
Body talisman Body talisman 1 4 Rare 264
Water talisman Water talisman 1 3 Uncommon 13,788
Earth talisman Earth talisman 1 3 Uncommon 4,020
Nature talisman Nature talisman 1 4 Rare 277
Chaos talisman Chaos talisman 1 3 Uncommon 1,004

Weaponry/ArmourEdit

  Item Quantity Rarity GE Market Price
Steel platebody Steel platebody 1 2 Common 929
Black claw Black claw 1 3 Uncommon [1] 375
Off-hand black claw Off-hand black claw 1 3 Uncommon [1] 1,522
Black platebody Black platebody 1 2 Common 1,916
Mithril hatchet Mithril hatchet 1 2 Common 107
Rock-shell gloves Rock-shell gloves 1 3 Uncommon 18,510
Rock-shell boots Rock-shell boots 1 3 Uncommon 8,087
Black warhammer Black warhammer 1 3 Uncommon 450
Off-hand black warhammer Off-hand black warhammer 1 3 Uncommon 341
Adamant longsword Adamant longsword 1 3 Uncommon 1,433
Adamant warhammer Adamant warhammer 1 4 Rare 2,531
  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 5
Belladonna seed 5 Belladonna seed 1 3 Uncommon 84
Herb seed 5 Guam seed 1 3 Uncommon 3
Herb seed 5 Marrentill seed 1 3 Uncommon 10
Herb seed 5 Tarromin seed 1 3 Uncommon 7
Herb seed 5 Harralander seed 1 3 Uncommon 10
Herb seed 5 Toadflax seed 1 4 Rare 2,344
Herb seed 5 Ranarr seed 1 4 Rare 1,588
Herb seed 5 Irit seed 1 4 Rare 232
Herb seed 5 Avantoe seed 1 4 Rare 2,316
Herb seed 5 Snapdragon seed 1 4 Rare 1,574
Herb seed 5 Cadantine seed 1 4 Rare 805
Herb seed 5 Lantadyme seed 1 4 Rare 31,545
Herb seed 5 Dwarf weed seed 1 5 Very rare 39,845
Herb seed 5 Torstol seed 1 5 Very rare 24,525

HerbsEdit

  Item Quantity Rarity GE Market Price
Grimy guam Grimy guam 1 3 Uncommon 718
Grimy marrentill Grimy marrentill 1 3 Uncommon 94
Grimy tarromin Grimy tarromin 1 3 Uncommon 35
Grimy harralander Grimy harralander 1 3 Uncommon 165
Grimy ranarr Grimy ranarr 1 4 Rare 3,038
Grimy irit Grimy irit 1 4 Rare 2,789
Grimy avantoe Grimy avantoe 1 4 Rare 4,356
Grimy kwuarm Grimy kwuarm 1 4 Rare 4,497
Grimy cadantine Grimy cadantine 1 4 Rare 2,130
Grimy lantadyme Grimy lantadyme 1 4 Rare 8,906
Grimy dwarf weed Grimy dwarf weed 1 4 Rare 9,828

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 288
Raw bass Raw bass 1 2 Common 405
Tinderbox Tinderbox 1 2 Common 280
Casket Casket 1 4 Rare 6,479
Rock-shell splinter Rock-shell splinter 1 3 Uncommon 12,902
Rock-shell chunk Rock-shell chunk 1 4 Rare 6,275
Rock-shell shard Rock-shell shard 1 4 Rare 11,584
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 1,318
Uncut emerald Uncut emerald 1 2 Common 2,707
Uncut ruby Uncut ruby 1 2 Common 3,697
Uncut diamond Uncut diamond 1 3 Uncommon 6,310
Loop half of a key Loop half of a key 1 3 Uncommon 17,967
Tooth half of a key Tooth half of a key 1 3 Uncommon 39,712
Uncut dragonstone Uncut dragonstone 1 4 Rare 15,617
Dragonstone Dragonstone 1 4 Rare 10,122
Dragon dagger Dragon dagger 1 3 Uncommon 16,403
Rune battleaxe Rune battleaxe 1 4 Rare 24,212
Rune javelin Rune javelin 5 4 Rare 875
Adamant javelin Adamant javelin 20 5 Very rare 1,200
Rune 2h sword Rune 2h sword 1 5 Very rare 37,208
Rune spear Rune spear 1 5 Very rare 11,355
Dragon spear Dragon spear 1 5 Very rare 36,123
Dragon dagger Dragon dagger 50 (noted) 5 Very rare 820,150
Rune sq shield Rune sq shield 1 5 Very rare 22,211
Rune kiteshield Rune kiteshield 1 5 Very rare 31,544
Shield left half Shield left half 1 5 Very rare 64,258
Dragon helm Dragon helm 1 5 Very rare 59,109
Adamant bolts 5 Adamant bolts 200 3 Uncommon 16,600
Onyx bolts 5 Onyx bolts 150 4 Rare 1,263,150
Rune arrow 5 Rune arrow 150–200, 500 4 Rare 22,500–75,000
Battlestaff Battlestaff 200 (noted) 4 Rare 1,591,000
Vecna skull Vecna skull 1 5 Very rare 89,644
Water talisman Water talisman 1 3 Uncommon 13,788
Earth talisman Earth talisman 25–35 (noted) 3 Uncommon 100,500–140,700
Fire talisman Fire talisman 25–35 (noted) 3 Uncommon 100,675–140,945
Chaos talisman Chaos talisman 1 3 Uncommon 1,004
Nature talisman Nature talisman 1 3 Uncommon 277
Pure essence Pure essence 500–15,000 (noted) 3 Uncommon 9,000–270,000
Nature rune Nature rune 20–80 4 Rare 5,600–22,400
Soul rune Soul rune 20 4 Rare 3,400
Law rune Law rune 45 4 Rare 13,950
Death rune Death rune 50, 121 4 Rare 9,000–21,780
Blood rune Blood rune 50 4 Rare 14,300
Raw swordfish Raw swordfish 125–250, 1,000 (noted) 3 Uncommon 49,250–394,000
Raw shark Raw shark 250–500 (noted) 3 Uncommon 438,500–877,000
Big bones Big bones 150–500 (noted) 3 Uncommon 91,350–304,500
Coal Coal 150–7,500 (noted) 3 Uncommon 35,550–1,777,500
Adamantite ore Adamantite ore 150–800 (noted) 3 Uncommon 268,500–1,432,000
Silver ore Silver ore 100 (noted) 4 Rare 9,500
Runite ore Runite ore 100 (noted) 4 Rare 1,114,100
Adamant bar Adamant bar 1,000–7,000 (noted) 4 Rare 3,000,000–21,000,000
Rune bar Rune bar 1, 50 (noted) 4 Rare 14,228–711,400
Clean toadflax Clean toadflax 25–250 (noted) 3 Uncommon 134,025–1,340,250
Clean snapdragon Clean snapdragon 30–120 (noted) 3 Uncommon 129,150–516,600
Clean torstol Clean torstol 10–100 (noted) 3 Uncommon 89,700–897,000
Watermelon seed 5 Watermelon seed 3 3 Uncommon 5,967
Yew seed 5 Yew seed 1–50 4 Rare 69,344–3,467,200
Magic seed 5 Magic seed 1–7 4 Rare 116,711–816,977
Palm tree seed 5 Palm tree seed 10 4 Rare 1,147,970
Herb seed 5 Snapdragon seed 1 4 Rare 1,574
Yew logs Yew logs 50–20,000 (noted) 4 Rare 20,650–8,260,000
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 nearly 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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