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
Use the middle south entrance just east of the wizard who teleports player to the Abyss. This is labelled entrance number 2 and goes directly to the giant rock crabs.
Giant Rock Crabs are extremely resistant to
Melee and Ranged attacks, and thus are only effectively killed using Magic.
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.
They are most vulnerable to fire-based spells.
The Giant Rock Crab is one of few monsters that will
retreat from battle when they become critically wounded.
GE market price
Bones 1 Always 119
^ a b Main hand and off hand claws are dropped together.
Rare drop table drops Edit
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
GE market price
Coins 250–500; 3,000 Common Not sold
Uncut sapphire 1 Common 877
Uncut emerald 1 Common 1,483
Uncut ruby 1 Common 2,499
Uncut diamond 1 Common 4,425
Uncut diamond 45–55 (noted) Rare 199,125–243,375
Loop half of a key 1 Uncommon 18,062
Tooth half of a key 1 Uncommon 36,709
Uncut dragonstone 1 Uncommon 13,145
Uncut dragonstone 45–55 (noted) Rare 591,525–722,975
Dragon longsword 1 Common 57,686 Dragon spear 1 Uncommon 35,904
Battlestaff 180–220 (noted) Uncommon 1,295,100–1,582,900
Rune javelin 5 Rare 915
Rune platebody 1 Uncommon 37,888
Rune platebody 15–25 (noted) Rare 568,320–947,200
Shield left half 1 Uncommon 64,308
Dragon helm 1 Uncommon 59,056
Rune arrowheads 113–137 Common 23,278–28,222
Onyx bolts 135–165 Rare 1,126,575–1,376,925
Vecna skull 1 Uncommon 40,006
Chaos talisman 1 Uncommon 888
Nature talisman 1 Uncommon 490
Water talisman 65–82 (noted) Rare 805,805–1,016,554
Earth talisman 65–82 (noted) Rare 233,805–294,954
Fire talisman 25–35 (noted) Rare 81,875–114,625
Raw lobster 135–165 (noted) Uncommon 26,865–32,835
Raw shark 225–275 (noted) Uncommon 205,200–250,800
Big bones 79–90 (noted) Uncommon 28,282–32,220
Dragon bones 180–220 (noted) Uncommon 354,780–433,620
Coal 200–1,100 (noted) Uncommon 72,600–399,300
Gold ore 90–110 (noted) Common 13,500–16,500
Adamantite ore 180–220 (noted) Uncommon 236,880–289,520
Adamant bar 15 (noted) Common 46,350
Adamant bar 135–165 (noted) Rare 417,150–509,850
Runite ore 90–110 (noted) Rare 910,080–1,112,320
Rune bar 3 (noted) Common 42,060
Rune bar 45–55 (noted) Rare 630,900–771,100
Grimy torstol 90–110 (noted) Uncommon 491,670–600,930
Grimy snapdragon 90–110 (noted) Uncommon 376,290–459,910
Super restore (4) 45–55 (noted) Uncommon 168,885–206,415
Prayer potion (4) 45–55 (noted) Uncommon 124,065–151,635
Lantadyme seed 14–16 Uncommon 97,342–111,248
Dwarf weed seed 14–16 Uncommon 123,536–141,184
Magic seed 4 Uncommon 414,124
Palm tree seed 10 Rare 1,532,710
Flax 450–550 (noted) Common 11,250–13,750
Molten glass 45–55 (noted) Common 6,750–8,250
Soft clay 450–550 (noted) Uncommon 81,900–100,100
Yew logs 68–82 Uncommon 15,640–18,860
Yew logs 675–825 (noted) Rare 155,250–189,750
Teak plank 45–55 (noted) Uncommon 31,680–38,720
Mahogany plank 270–330 (noted) Rare 603,720–737,880
Brawling gloves (Melee) 1 Rare Not sold
Brawling gloves (Magic) 1 Rare Not sold
Brawling gloves (Ranged) 1 Rare Not sold
Brawling gloves (Agility) 1 Rare Not sold
Brawling gloves (Cooking) 1 Rare Not sold
Brawling gloves (FM) 1 Rare Not sold
Brawling gloves (Fishing) 1 Rare Not sold
Brawling gloves (Hunter) 1 Rare Not sold
Brawling gloves (Mining) 1 Rare Not sold
Brawling gloves (Prayer) 1 Rare Not sold
Brawling gloves (Smithing) 1 Rare Not sold
Brawling gloves (Thieving) 1 Rare Not sold
Brawling gloves (WC) 1 Rare Not sold
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 Edit
Universal drops are dropped by nearly every monster outside of Daemonheim.
These drops are dropped alongside main drops.
GE market price
Key token 1 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.