|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 397
Item Quantity Rarity GE Market Price Water rune 1–39 Common 21–819 Earth rune 2–37 Common 26–481 Air talisman 1 Uncommon 259 Mind talisman 1 Uncommon 309 Fire talisman 1 Uncommon 3,226 Cosmic talisman 1 Rare 265 Body talisman 1 Rare 426 Water talisman 1 Uncommon 13,160 Earth talisman 1 Uncommon 1,630 Nature talisman 1 Rare 362 Chaos talisman 1 Uncommon 176
Item Quantity Rarity GE Market Price Steel platebody 1 Common 902 Black claw 1 Uncommon 582 Off-hand black claw 1 Uncommon 3,096 Black platebody 1 Common 1,970 Mithril hatchet 1 Common 75 Rock-shell gloves 1 Uncommon 11,102 Rock-shell boots 1 Uncommon 1,240 Black warhammer 1 Uncommon 477 Off-hand black warhammer 1 Uncommon 582 Adamant longsword 1 Uncommon 1,425 Adamant warhammer 1 Rare 2,636
- 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 385 Guam seed 1 Uncommon 2 Marrentill seed 1 Uncommon 2 Tarromin seed 1 Uncommon 6 Harralander seed 1 Uncommon 9 Toadflax seed 1 Rare 1,804 Ranarr seed 1 Rare 1,378 Irit seed 1 Rare 260 Avantoe seed 1 Rare 4,958 Snapdragon seed 1 Rare 2,043 Cadantine seed 1 Rare 2,790 Lantadyme seed 1 Rare 43,172 Dwarf weed seed 1 Very rare 52,783 Torstol seed 1 Very rare 19,930
Item Quantity Rarity GE Market Price Grimy guam 1 Uncommon 604 Grimy marrentill 1 Uncommon 86 Grimy tarromin 1 Uncommon 43 Grimy harralander 1 Uncommon 183 Grimy ranarr 1 Rare 2,524 Grimy irit 1 Rare 2,535 Grimy avantoe 1 Rare 4,461 Grimy kwuarm 1 Rare 2,338 Grimy cadantine 1 Rare 1,946 Grimy lantadyme 1 Rare 9,235 Grimy dwarf weed 1 Rare 11,126
Item Quantity Rarity GE Market Price Coins 27, 28, 42, 70, 137 Common Not sold Raw lobster 1 Common 222 Raw bass 1 Common 486 Tinderbox 1 Common 177 Casket 1 Rare 5,098 Rock-shell splinter 1 Uncommon 10,908 Rock-shell chunk 1 Rare 5,528 Rock-shell shard 1 Rare 8,924 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 1,730 Uncut emerald 1 Common 3,348 Uncut ruby 1 Common 3,974 Uncut diamond 1 Uncommon 8,346 Loop half of a key 1 Uncommon 27,521 Tooth half of a key 1 Uncommon 44,195 Uncut dragonstone 1 Rare 17,365 Dragonstone 1 Rare 10,899 Dragon dagger 1 Uncommon 16,748 Rune battleaxe 1 Rare 24,096 Rune javelin 5 Rare 890 Adamant javelin 20 Very rare 1,000 Rune 2h sword 1 Very rare 37,433 Rune spear 1 Very rare 11,460 Dragon spear 1 Very rare 36,438 Dragon dagger 50 (noted) Very rare 837,400 Rune sq shield 1 Very rare 22,488 Rune kiteshield 1 Very rare 31,974 Shield left half 1 Very rare 64,793 Dragon helm 1 Very rare 60,652 Adamant bolts 200 Uncommon 18,800 Onyx bolts 150 Rare 1,263,150 Rune arrow 150–200, 500 Rare 22,500–75,000 Battlestaff 200 (noted) Rare 1,549,600 Air orb 1,000 (noted) Rare 2,901,000 Fire orb 1,000 (noted) Rare 2,402,000 Vecna skull 1 Very rare 146,706 Water talisman 1 Uncommon 13,160 Earth talisman 25–35 (noted) Uncommon 40,750–57,050 Fire talisman 25–35 (noted) Uncommon 80,650–112,910 Chaos talisman 1 Uncommon 176 Nature talisman 1 Uncommon 362 Pure essence 500–15,000 (noted) Uncommon 8,500–255,000 Nature rune 20–80 Rare 6,340–25,360 Soul rune 20 Rare 2,700 Law rune 45 Rare 13,095 Death rune 50, 121 Rare 5,950–14,399 Blood rune 50 Rare 14,200 Raw swordfish 125–250, 1,000 (noted) Uncommon 50,375–403,000 Raw shark 250–500 (noted) Uncommon 441,750–883,500 Big bones 150–500 (noted) Uncommon 84,450–281,500 Coal 150–7,500 (noted) Uncommon 28,200–1,410,000 Adamantite ore 150–800 (noted) Uncommon 472,050–2,517,600 Silver ore 100 (noted) Rare 10,900 Runite ore 100 (noted) Rare 1,060,600 Adamant bar 1,000–7,000 (noted) Rare 4,040,000–28,280,000 Rune bar 1, 50, 150 (noted) Rare 13,006–1,950,900 Clean ranarr 33 (noted) Uncommon 87,153 Clean toadflax 25–250 (noted) Uncommon 102,200–1,022,000 Clean snapdragon 30–120 (noted) Uncommon 112,560–450,240 Clean torstol 10–100 (noted) Uncommon 53,280–532,800 Saradomin brew (4) 250 (noted) Very rare 105,000 Watermelon seed 3 Uncommon 8,247 Yew seed 1–50 Rare 91,337–4,566,850 Magic seed 1–7 Rare 190,413–1,332,891 Palm tree seed 10 Rare 1,181,590 Snapdragon seed 1 Rare 2,043 Torstol seed 1–31 Rare 19,930–617,830 Fellstalk seed 2 Rare 1,286 Yew logs 50–20,000 (noted) Rare 29,400–11,760,000 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