|Release date||1 August 2005 (Update)|
|Combat level|| 136|
|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 330
Item Quantity Rarity GE Market Price Water rune 1–39 Common 20–780 Earth rune 2–37 Common 26–481 Air talisman 1 Uncommon 162 Mind talisman 1 Uncommon 324 Fire talisman 1 Uncommon 2,233 Cosmic talisman 1 Rare 599 Body talisman 1 Rare 363 Water talisman 1 Uncommon 11,420 Earth talisman 1 Uncommon 1,461 Nature talisman 1 Rare 517 Chaos talisman 1 Uncommon 526
Item Quantity Rarity GE Market Price Steel platebody 1 Common 976 Black claw 1 Uncommon 521 Off-hand black claw 1 Uncommon 2,591 Black platebody 1 Common 1,843 Mithril hatchet 1 Common 103 Rock-shell gloves 1 Uncommon 13,618 Rock-shell boots 1 Uncommon 1,426 Black warhammer 1 Uncommon 435 Off-hand black warhammer 1 Uncommon 487 Adamant longsword 1 Uncommon 1,411 Adamant warhammer 1 Rare 2,645
- 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 1 Belladonna seed 1 Uncommon 598 Guam seed 1 Uncommon 5 Marrentill seed 1 Uncommon 5 Tarromin seed 1 Uncommon 8 Harralander seed 1 Uncommon 9 Toadflax seed 1 Rare 2,145 Ranarr seed 1 Rare 1,422 Irit seed 1 Rare 222 Avantoe seed 1 Rare 3,082 Snapdragon seed 1 Rare 1,366 Cadantine seed 1 Rare 1,910 Lantadyme seed 1 Rare 38,136 Dwarf weed seed 1 Very rare 48,381 Torstol seed 1 Very rare 18,781
Item Quantity Rarity GE Market Price Grimy guam 1 Uncommon 515 Grimy marrentill 1 Uncommon 78 Grimy tarromin 1 Uncommon 40 Grimy harralander 1 Uncommon 201 Grimy ranarr 1 Rare 3,116 Grimy irit 1 Rare 3,002 Grimy avantoe 1 Rare 4,487 Grimy kwuarm 1 Rare 2,876 Grimy cadantine 1 Rare 2,034 Grimy lantadyme 1 Rare 9,301 Grimy dwarf weed 1 Rare 10,082
Item Quantity Rarity GE Market Price Coins 27, 28, 42, 70, 137 Common Not sold Raw lobster 1 Common 231 Raw bass 1 Common 469 Tinderbox 1 Common 129 Casket 1 Rare 5,684 Rock-shell splinter 1 Uncommon 11,196 Rock-shell chunk 1 Rare 5,456 Rock-shell shard 1 Rare 9,620 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 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 1,387 Uncut emerald 1 Common 3,026 Uncut ruby 1 Common 3,294 Uncut diamond 1 Uncommon 6,687 Loop half of a key 1 Uncommon 21,945 Tooth half of a key 1 Uncommon 42,746 Uncut dragonstone 1 Rare 14,154 Dragonstone 1 Rare 10,083 Dragon dagger 1 Uncommon 16,692 Rune battleaxe 1 Rare 24,227 Rune javelin 5 Rare 865 Adamant javelin 20 Very rare 1,200 Rune 2h sword 1 Very rare 37,388 Rune spear 1 Very rare 11,420 Dragon spear 1 Very rare 37,114 Dragon dagger 50 (noted) Very rare 834,600 Rune sq shield 1 Very rare 22,475 Rune kiteshield 1 Very rare 31,642 Shield left half 1 Very rare 64,729 Dragon helm 1 Very rare 60,094 Adamant bolts 200 Uncommon 11,400 Onyx bolts 150 Rare 1,254,000 Rune arrow 150–200, 500 Rare 22,500–75,000 Battlestaff 200 (noted) Rare 1,611,400 Air orb 1,000 (noted) Rare 2,647,000 Fire orb 1,000 (noted) Rare 2,158,000 Vecna skull 1 Very rare 136,971 Water talisman 1 Uncommon 11,420 Earth talisman 25–35 (noted) Uncommon 36,525–51,135 Fire talisman 25–35 (noted) Uncommon 55,825–78,155 Chaos talisman 1 Uncommon 526 Nature talisman 1 Uncommon 517 Pure essence 500–15,000 (noted) Uncommon 6,000–180,000 Nature rune 20–80 Rare 6,820–27,280 Soul rune 20 Rare 2,680 Law rune 45 Rare 13,320 Death rune 50, 121 Rare 5,550–13,431 Blood rune 50 Rare 11,000 Raw swordfish 125–250, 1,000 (noted) Uncommon 42,125–337,000 Raw shark 250–500 (noted) Uncommon 438,000–876,000 Big bones 150–500 (noted) Uncommon 89,100–297,000 Coal 150–7,500 (noted) Uncommon 28,800–1,440,000 Adamantite ore 150–800 (noted) Uncommon 375,150–2,000,800 Silver ore 100 (noted) Rare 10,200 Runite ore 100 (noted) Rare 1,078,200 Adamant bar 1,000–7,000 (noted) Rare 3,548,000–24,836,000 Rune bar 1, 50, 150 (noted) Rare 13,043–1,956,450 Clean ranarr 33 (noted) Uncommon 106,161 Clean toadflax 25–250 (noted) Uncommon 107,925–1,079,250 Clean snapdragon 30–120 (noted) Uncommon 123,780–495,120 Clean torstol 10–100 (noted) Uncommon 66,990–669,900 Saradomin brew (4) 250 (noted) Very rare 98,750 Watermelon seed 3 Uncommon 9,213 Yew seed 1–50 Rare 70,800–3,540,000 Magic seed 1–7 Rare 162,101–1,134,707 Palm tree seed 10 Rare 1,045,140 Snapdragon seed 1 Rare 1,366 Torstol seed 1–31 Rare 18,781–582,211 Fellstalk seed 2 Rare 1,962 Yew logs 50–20,000 (noted) Rare 27,200–10,880,000 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
- 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 1 Rare Not sold