|Release date||1 August 2005 (Update)|
|XP per kill||399 (and 131.6 experience)|
|Examine text|| •No one likes crabs... especially really big ones!|
•"Heavy rock!" (when disguised as a boulder)
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.
- 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.
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.
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.
Item Quantity Rarity GE Market Price Bones 1 Always 232
Item Quantity Rarity GE Market Price Water rune 1–39 Common 19–741 Earth rune 2–37 Common 22–407 Air talisman 1 Uncommon 98 Mind talisman 1 Uncommon 139 Fire talisman 1 Uncommon 3,297 Cosmic talisman 1 Rare 148 Body talisman 1 Rare 206 Water talisman 1 Uncommon 10,515 Earth talisman 1 Uncommon 690 Nature talisman 1 Rare 138 Chaos talisman 1 Uncommon 99
Item Quantity Rarity GE Market Price Steel platebody 1 Common 1,108 Black claw 1 Uncommon 711 Off-hand black claw 1 Uncommon 4,669 Black platebody 1 Common 2,121 Mithril hatchet 1 Common 100 Rock-shell gloves 1 Uncommon 5,603 Rock-shell boots 1 Uncommon 851 Black warhammer 1 Uncommon 664 Off-hand black warhammer 1 Uncommon 762 Adamant longsword 1 Uncommon 1,526 Adamant warhammer 1 Rare 2,839
- 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).
Item Quantity Rarity GE Market Price Poison ivy seed 1 Uncommon 49 Belladonna seed 1 Uncommon 109 Guam seed 1 Uncommon 11 Marrentill seed 1 Uncommon 25 Tarromin seed 1 Uncommon 8 Harralander seed 1 Uncommon 5 Toadflax seed 1 Rare 1,967 Ranarr seed 1 Rare 797 Irit seed 1 Rare 226 Avantoe seed 1 Rare 3,192 Snapdragon seed 1 Rare 2,500 Cadantine seed 1 Rare 3,042 Lantadyme seed 1 Rare 43,601 Dwarf weed seed 1 Very rare 58,397 Torstol seed 1 Very rare 19,580
Item Quantity Rarity GE Market Price Grimy guam 1 Uncommon 563 Grimy marrentill 1 Uncommon 61 Grimy tarromin 1 Uncommon 50 Grimy harralander 1 Uncommon 200 Grimy ranarr 1 Rare 1,996 Grimy irit 1 Rare 2,689 Grimy avantoe 1 Rare 4,721 Grimy kwuarm 1 Rare 2,787 Grimy cadantine 1 Rare 3,119 Grimy lantadyme 1 Rare 9,899 Grimy dwarf weed 1 Rare 11,766
Item Quantity Rarity GE Market Price Coins 27, 28, 42, 70, 137 Common Not sold Raw lobster 1 Common 173 Raw bass 1 Common 322 Tinderbox 1 Common 102 Casket 1 Rare 6,548 Rock-shell splinter 1 Uncommon 12,043 Rock-shell chunk 1 Rare 5,938 Rock-shell shard 1 Rare 9,449 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
- This monster has access to the rare drop table.
The ring of wealth improves the chances when equipped but is not required to access the table.
Show/hide rare drop table Item Quantity Rarity GE Market Price Coins 250 – 450, 3,000, 9,000, 10,000, 12,000 Common Not sold Uncut sapphire 1 Common 1,761 Uncut emerald 1 Common 3,285 Uncut ruby 1 Common 4,737 Uncut diamond 1 Uncommon 8,499 Loop half of a key 1 Uncommon 24,615 Tooth half of a key 1 Uncommon 40,026 Uncut dragonstone 1 Rare 16,534 Dragonstone 1 Rare 10,032 Dragon dagger 1 Uncommon 16,701 Rune battleaxe 1 Rare 24,329 Rune javelin 5 Rare 880 Adamant javelin 20 Very rare 1,040 Rune 2h sword 1 Very rare 37,290 Rune spear 1 Very rare 11,296 Dragon spear 1 Very rare 36,452 Dragon dagger 50 (noted) Very rare 835,050 Rune sq shield 1 Very rare 22,470 Rune kiteshield 1 Very rare 32,050 Shield left half 1 Very rare 66,362 Dragon helm 1 Very rare 59,194 Adamant bolts 200 Uncommon 12,400 Onyx bolts 150 Rare 1,269,900 Rune arrow 150–200, 500 Rare 22,500–75,000 Battlestaff 200 (noted) Rare 1,508,400 Air orb 1,000 (noted) Rare 4,105,000 Fire orb 1,000 (noted) Rare 3,392,000 Vecna skull 1 Very rare 89,088 Water talisman 1 Uncommon 10,515 Earth talisman 25–35 (noted) Uncommon 17,250–24,150 Fire talisman 25–35 (noted) Uncommon 82,425–115,395 Chaos talisman 1 Uncommon 99 Nature talisman 1 Uncommon 138 Pure essence 500–15,000 (noted) Uncommon 10,500–315,000 Nature rune 20–80 Rare 5,700–22,800 Soul rune 20 Rare 2,540 Law rune 45 Rare 16,200 Death rune 50, 121 Rare 4,900–11,858 Blood rune 50 Rare 10,950 Raw swordfish 125–250, 1,000 (noted) Uncommon 38,625–309,000 Raw shark 250–500 (noted) Uncommon 454,000–908,000 Big bones 150–500 (noted) Uncommon 83,250–277,500 Coal 150–7,500 (noted) Uncommon 24,450–1,222,500 Adamantite ore 150–800 (noted) Uncommon 454,200–2,422,400 Silver ore 100 (noted) Rare 11,200 Runite ore 100 (noted) Rare 1,030,300 Adamant bar 1,000–7,000 (noted) Rare 3,934,000–27,538,000 Rune bar 1, 50, 150 (noted) Rare 12,983–1,947,450 Clean ranarr 33 (noted) Uncommon 67,320 Clean toadflax 25–250 (noted) Uncommon 111,950–1,119,500 Clean snapdragon 30–120 (noted) Uncommon 138,660–554,640 Clean torstol 10–100 (noted) Uncommon 59,230–592,300 Saradomin brew (4) 250 (noted) Very rare 51,000 Watermelon seed 3 Uncommon 8,619 Yew seed 1–50 Rare 70,847–3,542,350 Magic seed 1–7 Rare 153,310–1,073,170 Palm tree seed 10 Rare 1,487,310 Snapdragon seed 1 Rare 2,500 Torstol seed 1–31 Rare 19,580–606,980 Fellstalk seed 2 Rare 1,022 Yew logs 100–20,000 (noted) Rare 48,700–9,740,000 Crystal triskelion fragment 1 1 Very rare Not sold Crystal triskelion fragment 2 1 Very rare Not sold Crystal triskelion fragment 3 1 Very rare Not sold
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.