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 196
^ 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 746
Uncut emerald 1 Common 1,479
Uncut ruby 1 Common 2,365
Uncut diamond 1 Common 4,201
Uncut diamond 45–55 (noted) Rare 189,045–231,055
Loop half of a key 1 Uncommon 14,805
Tooth half of a key 1 Uncommon 34,918
Uncut dragonstone 1 Uncommon 12,497
Uncut dragonstone 45–55 (noted) Rare 562,365–687,335
Dragon longsword 1 Common 57,608 Dragon spear 1 Uncommon 35,911
Battlestaff 180–220 (noted) Uncommon 1,281,240–1,565,960
Rune javelin 5 Rare 890
Rune platebody 1 Uncommon 37,857
Rune platebody 15–25 (noted) Rare 567,855–946,425
Shield left half 1 Uncommon 64,653
Dragon helm 1 Uncommon 58,869
Rune arrowheads 113–137 Common 23,956–29,044
Onyx bolts 135–165 Rare 1,124,550–1,374,450
Vecna skull 1 Uncommon 40,585
Chaos talisman 1 Uncommon 883
Nature talisman 1 Uncommon 322
Water talisman 65–82 (noted) Rare 889,330–1,121,924
Earth talisman 65–82 (noted) Rare 220,870–278,636
Fire talisman 25–35 (noted) Rare 80,950–113,330
Raw lobster 135–165 (noted) Uncommon 29,565–36,135
Raw shark 225–275 (noted) Uncommon 186,975–228,525
Big bones 79–90 (noted) Uncommon 29,230–33,300
Dragon bones 180–220 (noted) Uncommon 299,520–366,080
Coal 200–1,100 (noted) Uncommon 75,400–414,700
Gold ore 90–110 (noted) Common 14,850–18,150
Adamantite ore 180–220 (noted) Uncommon 241,020–294,580
Adamant bar 15 (noted) Common 45,000
Adamant bar 135–165 (noted) Rare 405,000–495,000
Runite ore 90–110 (noted) Rare 934,920–1,142,680
Rune bar 3 (noted) Common 42,843
Rune bar 45–55 (noted) Rare 642,645–785,455
Grimy torstol 90–110 (noted) Uncommon 499,410–610,390
Grimy snapdragon 90–110 (noted) Uncommon 399,060–487,740
Super restore (4) 45–55 (noted) Uncommon 158,760–194,040
Prayer potion (4) 45–55 (noted) Uncommon 137,295–167,805
Lantadyme seed 14–16 Uncommon 86,800–99,200
Dwarf weed seed 14–16 Uncommon 152,348–174,112
Magic seed 4 Uncommon 461,076
Palm tree seed 10 Rare 1,581,620
Flax 450–550 (noted) Common 10,350–12,650
Molten glass 45–55 (noted) Common 6,885–8,415
Soft clay 450–550 (noted) Uncommon 82,350–100,650
Yew logs 68–82 Uncommon 16,932–20,418
Yew logs 675–825 (noted) Rare 168,075–205,425
Teak plank 45–55 (noted) Uncommon 34,200–41,800
Mahogany plank 270–330 (noted) Rare 666,630–814,770
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.