|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 315
Item Quantity Rarity GE Market Price Water rune 1–39 Common 20–780 Earth rune 2–37 Common 22–407 Air talisman 1 Uncommon 122 Mind talisman 1 Uncommon 314 Fire talisman 1 Uncommon 1,674 Cosmic talisman 1 Rare 650 Body talisman 1 Rare 318 Water talisman 1 Uncommon 11,536 Earth talisman 1 Uncommon 1,402 Nature talisman 1 Rare 447 Chaos talisman 1 Uncommon 665
Item Quantity Rarity GE Market Price Steel platebody 1 Common 936 Black claw 1 Uncommon 501 Off-hand black claw 1 Uncommon 2,591 Black platebody 1 Common 1,904 Mithril hatchet 1 Common 102 Rock-shell gloves 1 Uncommon 14,099 Rock-shell boots 1 Uncommon 1,495 Black warhammer 1 Uncommon 441 Off-hand black warhammer 1 Uncommon 470 Adamant longsword 1 Uncommon 1,407 Adamant warhammer 1 Rare 2,639
- 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 639 Guam seed 1 Uncommon 4 Marrentill seed 1 Uncommon 6 Tarromin seed 1 Uncommon 6 Harralander seed 1 Uncommon 11 Toadflax seed 1 Rare 1,891 Ranarr seed 1 Rare 1,296 Irit seed 1 Rare 258 Avantoe seed 1 Rare 3,376 Snapdragon seed 1 Rare 1,406 Cadantine seed 1 Rare 1,805 Lantadyme seed 1 Rare 37,332 Dwarf weed seed 1 Very rare 49,718 Torstol seed 1 Very rare 16,095
Item Quantity Rarity GE Market Price Grimy guam 1 Uncommon 497 Grimy marrentill 1 Uncommon 72 Grimy tarromin 1 Uncommon 40 Grimy harralander 1 Uncommon 204 Grimy ranarr 1 Rare 3,010 Grimy irit 1 Rare 2,821 Grimy avantoe 1 Rare 4,650 Grimy kwuarm 1 Rare 3,028 Grimy cadantine 1 Rare 1,992 Grimy lantadyme 1 Rare 9,250 Grimy dwarf weed 1 Rare 10,592
Item Quantity Rarity GE Market Price Coins 27, 28, 42, 70, 137 Common Not sold Raw lobster 1 Common 229 Raw bass 1 Common 458 Tinderbox 1 Common 119 Casket 1 Rare 5,814 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 1,405 Uncut emerald 1 Common 3,148 Uncut ruby 1 Common 3,240 Uncut diamond 1 Uncommon 6,722 Loop half of a key 1 Uncommon 19,784 Tooth half of a key 1 Uncommon 41,520 Uncut dragonstone 1 Rare 14,664 Dragonstone 1 Rare 10,352 Dragon dagger 1 Uncommon 16,556 Rune battleaxe 1 Rare 24,054 Rune javelin 5 Rare 880 Adamant javelin 20 Very rare 1,120 Rune 2h sword 1 Very rare 37,543 Rune spear 1 Very rare 11,312 Dragon spear 1 Very rare 36,127 Dragon dagger 50 (noted) Very rare 827,800 Rune sq shield 1 Very rare 22,359 Rune kiteshield 1 Very rare 31,832 Shield left half 1 Very rare 64,166 Dragon helm 1 Very rare 60,262 Adamant bolts 200 Uncommon 12,200 Onyx bolts 150 Rare 1,257,300 Rune arrow 150–200, 500 Rare 22,350–74,500 Battlestaff 200 (noted) Rare 1,594,000 Air orb 1,000 (noted) Rare 2,908,000 Fire orb 1,000 (noted) Rare 2,097,000 Vecna skull 1 Very rare 140,908 Water talisman 1 Uncommon 11,536 Earth talisman 25–35 (noted) Uncommon 35,050–49,070 Fire talisman 25–35 (noted) Uncommon 41,850–58,590 Chaos talisman 1 Uncommon 665 Nature talisman 1 Uncommon 447 Pure essence 500–15,000 (noted) Uncommon 6,500–195,000 Nature rune 20–80 Rare 6,480–25,920 Soul rune 20 Rare 2,860 Law rune 45 Rare 13,185 Death rune 50, 121 Rare 5,650–13,673 Blood rune 50 Rare 10,400 Raw swordfish 125–250, 1,000 (noted) Uncommon 39,375–315,000 Raw shark 250–500 (noted) Uncommon 411,250–822,500 Big bones 150–500 (noted) Uncommon 86,250–287,500 Coal 150–7,500 (noted) Uncommon 28,800–1,440,000 Adamantite ore 150–800 (noted) Uncommon 370,650–1,976,800 Silver ore 100 (noted) Rare 10,300 Runite ore 100 (noted) Rare 1,055,400 Adamant bar 1,000–7,000 (noted) Rare 3,404,000–23,828,000 Rune bar 1, 50, 150 (noted) Rare 13,124–1,968,600 Clean ranarr 33 (noted) Uncommon 105,567 Clean toadflax 25–250 (noted) Uncommon 108,925–1,089,250 Clean snapdragon 30–120 (noted) Uncommon 128,490–513,960 Clean torstol 10–100 (noted) Uncommon 63,880–638,800 Saradomin brew (4) 250 (noted) Very rare 99,000 Watermelon seed 3 Uncommon 8,700 Yew seed 1–50 Rare 67,803–3,390,150 Magic seed 1–7 Rare 155,959–1,091,713 Palm tree seed 10 Rare 996,730 Snapdragon seed 1 Rare 1,406 Torstol seed 1–31 Rare 16,095–498,945 Fellstalk seed 2 Rare 1,858 Yew logs 50–20,000 (noted) Rare 26,350–10,540,000 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