|Release date||1 August 2005 (Update)|
|XP per kill||419.1 (and 138.3 experience)|
|Examine text|| No one likes crabs... especially really big ones!|
(when disguised as a boulder) "Heavy rock!"
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 cast a spell on them gives the message "You can't attack this NPC."
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.
Two giant rock crabs, located immediately above the entrance to the dagganoth kings lair, currently have a combat level of 136.
- In Waterbirth Island Dungeon (a partner is required in order to do this).
- In the Chaos Tunnels (The middle south rift just east of Mage of Zamorak (Abyss) leads directly to them). This is recommended when one does not have a companion.
StrategyEditGiant Rock Crabs are extremely resistant to Melee and Ranged attacks, and thus are only effectively killed using Magic. However, Verac's armour and Diamond bolts (e) are quite effective with their shared unique effect, which can hit through their high physical and ranged defence, Verac's armour also has a prayer bonus allowing the player to use Protect from melee for longer than usual. This method is advised for those with a low Magic level but high melee combat levels. For lower attack levels the use of Attack Potions can be used to improve the chances of hitting. Rock Crabs drop three charms at once, and are a very good source of gold charms. These Crabs are not immune to poison, but are extremely difficult to poison them with a poisoned weapon like the dragon dagger or any poisoned ranged ammo because of their high Melee and Ranged defence.
Another method includes wearing rune or better armour, and bringing a weapon with a high crush attack bonus, such as the Zamorakian spear or Barrelchest anchor. Slash weapons such as the Abyssal whip are not recommended due to the crabs' high slash defence.
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.
Giant rock crabs have a very high defence, but relatively low attack and strength. If attacked in the Chaos Tunnels they will walk off and stop attacking you after a minute or two.
If using mage, note that they are most vulnerable to fire-based spells.
Mage Gear is as follows:
- Helmet: Farseer helmet > Infinity > Ahrim's > Dagon'hai > Mystic/Sacred clay
- Necklace: Stream necklace > Amulet of fury > Amulet of glory > Amulet of magic/Amulet of power
- Cape: God cape > Soul war cape > Ardougne cloak (4/3>2) > Obsidian cape, Cape of Accomplishment,
- Body: Ahrim's > Infinity > Dagon'hai > Mystic/Sacred clay
- Legs: Ahrim's > Infinity > Dagon'hai > Mystic/Sacred clay
- Weapon Slot: Polypore Staff, Elemental staff or a 'Magic damage'-increasing staff
- Shield: God book (Unholy>Ancient>Balance) or Broodoo Shield > Mage's book > Arcane spirit shield
- Gloves: Barrows gloves > Rune gloves > Lunar gloves > Regen bracelet
- Boots: Infinity > Wizard's > Mystic > Lunar > Swanky
- Ring: Seers' ring (i) > Tokkul-Zo > Beacon ring > Ring of Wealth
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.
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.
27 May 2009Edit
After the 27 May 2009 update, Giant Rock Crabs drop Charms in groups of three instead of ten. However, charm dropping rate was increased significantly. This hidden update initially angered players, though complaints died down as the rate of dropping them was increased.
Item Quantity Rarity GE Market Price Bones 1 Always 83
Item Quantity Rarity GE Market Price Water rune 1–39 Uncommon 13–507 Earth rune 2–37 Uncommon 18–333 Air talisman 1 Rare 145 Mind talisman 1 Rare 76 Fire talisman 1 Rare 2,018 Cosmic talisman 1 Rare 210 Body talisman 1 Rare 187 Water talisman 1 Rare 4,721 Earth talisman 1 Rare 793 Nature talisman 1 Rare 270
Item Quantity Rarity GE Market Price Steel platebody 1 Uncommon 1,160 Black claw 1 Uncommon 1,833 Black platebody 1 Uncommon 2,526 Mithril hatchet 1 Uncommon 186 Rock-shell gloves 1 Uncommon 2,254 Rock-shell boots 1 Uncommon 553 Black warhammer 1 Rare 583 Adamant longsword 1 Rare 1,668 Adamant warhammer 1 Rare 2,942
- Represents 90% confidence range, based on a sample of 2,437 kills.
3 charms are dropped at a time.
- Please add to the log (only if 50 or more creatures killed).
Item Quantity Rarity GE Market Price Poison ivy seed 1 Uncommon 54 Belladonna seed 1 Uncommon 33 Guam seed 1 Uncommon 8 Marrentill seed 1 Uncommon 12 Tarromin seed 1 Uncommon 4 Harralander seed 1 Uncommon 9 Toadflax seed 1 Rare 702 Ranarr seed 1 Rare 1,019 Irit seed 1 Rare 74 Avantoe seed 1 Rare 1,890 Snapdragon seed 1 Rare 2,196 Cadantine seed 1 Rare 2,354 Lantadyme seed 1 Rare 34,922 Dwarf weed seed 1 Very rare 38,269 Torstol seed 1 Very rare 78,509
Item Quantity Rarity GE Market Price Grimy guam 1 Uncommon 539 Grimy marrentill 1 Uncommon 44 Grimy tarromin 1 Uncommon 249 Grimy harralander 1 Uncommon 652 Grimy ranarr 1 Rare 2,160 Grimy irit 1 Rare 1,743 Grimy avantoe 1 Rare 4,128 Grimy kwuarm 1 Rare 2,471 Grimy cadantine 1 Rare 2,507 Grimy lantadyme 1 Rare 7,850 Grimy dwarf weed 1 Rare 8,195
Item Quantity Rarity GE Market Price Coins 27, 28, 42, 70, 137 Common Not sold Raw lobster 1 Common 128 Raw bass 1 Common 715 Tinderbox 1 Common 111 Casket 1 Rare 12,114 Rock-shell splinter 1 Uncommon 13,458 Rock-shell chunk 1 Rare 7,469 Rock-shell shard 1 Rare 11,374 Spin ticket 1 Rare Not sold Clue scroll (medium) 1 Very rare Not sold Starved ancient effigy 1 Very rare Not sold
Rare drop table dropsEdit
|Show/hide rare drop table|
Soloman Pets will not pick up their charms. Glitch or intended unknown.