Giant Rock Crab

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Giant Rock Crab
Release																				1 August 2005 (Update)
Members																				Yes
Actions																				Attack, Examine
Race																				? (edit)
Examine																				• No one likes crabs... especially really big ones! (after being approached) • Heavy rock! (when disguised as a boulder)
Combat info
Combat level																				95
Life points																				3,400
Aggressive
Poisonous
Combat experience
XP																				399
XP																				131.6
XP (2H/MH/OH)																				23 / 15 / 7
Offensive
Max hit
272															0															0															0
Style																														Rate
																														6 ticks (3.6s)
Combat levels
68																				1																				1
Accuracy
1,409																				0																				0
Defensive
Armour																				Weakness															Susceptible
1,409										68
Base hit chance
90															55															45															65
Immunities
Not immune															Not immune															Not immune															Not immune
Advanced data
NPC ID															2452
Links															bestiary • MRND
FAQ • doc

Giant Rock Crabs are larger versions of rock crabs. Similarly to their smaller cousins, they disguise themselves as boulders, and only reveal themselves to be giant rock crabs if a player approaches within 1 tile of them, at which point they become aggressive and attackable. Attempting to target or attack them in their boulder disguise will cancel the action and give the player the message "Invalid target."

They are primarily known for being the only monsters to drop rock-shell fragment items, used to create rock-shell armour. They are also known for being a fast source of gold charms, having a high drop rate, relatively low lifepoints, and that three charms are dropped at once.

Giant rock crabs are one of the few monsters that use the retreat mechanic, where they will try to flee from battle when they become critically wounded.

Locations

Location	Levels	Members	Spawns	Map
Waterbirth Island Dungeon sublevel 2	95		6	Maplink
Waterbirth Island Dungeon sublevel 3	95		5	Maplink
Waterbirth Island Dungeon sublevel 5	95		3	Maplink
Chaos Tunnels	95		16	Maplink

Drops

100% drop

	Item	Quantity	Rarity	GE Price	High Alch
	Bones	1	Always	386	1

Charms

Nothing	3	3	3	3
3%	78–80%	9–10%	6–7%	2%
Represents a 90% confidence range based on a sample of 6,372 kills. 3 items are dropped at a time. Add data to the log (requires JavaScript).

Main drop

	Item	Quantity	Rarity	GE Price	High Alch
	Water rune	1–39	Common	242–9,438	3–117
	Earth rune	1–40	Common	27–1,080	3–120
	Air talisman	1	Uncommon	1,250	2
	Mind talisman	1	Uncommon	566	2
	Fire talisman	1	Uncommon	249	2
	Cosmic talisman	1	Rare	661	2
	Body talisman	1	Rare	2,221	2
	Water talisman	1	Uncommon	757	2
	Earth talisman	1	Uncommon	205	2
	Nature talisman	1	Rare	1,344	2
	Chaos talisman	1	Uncommon	3,089	2
	Huge plated steel salvage	1	Common	1,599	1,200
	Black claw	1	Common	4,978	108
	Off-hand black claw	1	Common	2,512	108
	Black platebody	1	Common	3,714	2,304
	Tiny bladed mithril salvage	1	Common	1,566	600
	Rock-shell gloves	1	Uncommon	20,581	390
	Rock-shell boots	1	Uncommon	15,352	390
	Black warhammer	1	Uncommon	6,117	764
	Off-hand black warhammer	1	Uncommon	3,255	764
	Small bladed adamant salvage	1	Uncommon	3,767	4,000
	Medium blunt adamant salvage	1	Rare	20,328	6,000
	Poison ivy seed	1	Uncommon	327	99
	Cactus seed	1	Rare	708	59
	Cave nightshade seed	1	Uncommon	1,473	106
	Guam seed	1	Uncommon	1,070	2
	Marrentill seed	1	Uncommon	2,157	3
	Tarromin seed	1	Uncommon	3,131	4
	Harralander seed	1	Uncommon	8,371	7
	Toadflax seed	1	Uncommon	1,207	20
	Ranarr seed	1	Rare	16,921	11
	Irit seed	1	Rare	1,871	38
	Avantoe seed	1	Rare	3,928	38
	Snapdragon seed	1	Rare	4,137	38
	Cadantine seed	1	Rare	1,185	38
	Lantadyme seed	1	Rare	939	38
	Kwuarm seed	1	Rare	732	38
	Dwarf weed seed	1	Very rare	6,256	38
	Torstol seed	1	Very rare	7,931	38
	Grimy guam	1	Uncommon	336	18
	Grimy marrentill	1	Uncommon	782	1
	Grimy tarromin	1	Uncommon	248	1
	Grimy harralander	1	Uncommon	592	1
	Grimy ranarr	1	Rare	4,274	1
	Grimy irit	1	Rare	522	1
	Grimy avantoe	1	Rare	1,150	1
	Grimy kwuarm	1	Rare	2,571	1
	Grimy cadantine	1	Rare	1,920	1
	Grimy lantadyme	1	Rare	5,110	1
	Grimy dwarf weed	1	Rare	6,178	1
	Coins	23–137	Common	23–137	23–137
	Raw lobster	1	Common	512	170
	Raw bass	1	Common	2,484	168
	Tinderbox	1	Common	358	1
	Casket	1	Rare	1,008	30
	Rock-shell splinter	1	Uncommon	4,179	36
	Rock-shell chunk	1	Rare	1,936	36
	Rock-shell shard	1	Rare	3,859	36

Tertiary drops

	Item	Quantity	Rarity	GE Price	High Alch
	Sealed clue scroll (medium)	1	1/128	1	1
	Starved ancient effigy	1	Very rare	Not sold	Not alchemisable
	Rare drop table	1	Rare	Not sold	Not alchemisable

Rare drop table

This monster has access to the rare drop table.
Luck-enhancing items are not required to access the table, but they will increase the chance of accessing the rare drop table and may also improve the loot received from it.

Rare drop table:

Rare drop table Item Quantity Rarity GE price High alch value Coins 250–500 Common 250–500 250–500 Coins 50 Common 50 50 Uncut sapphire 1 Common 419 15 Uncut emerald 1 Common 316 30 Uncut ruby 1 Common 428 60 Uncut diamond 1 Common 1,051 120 Uncut diamond 45–55 (noted) Rare 47,295–57,805 5,400–6,600 Uncut dragonstone (m) 1 Uncommon 6,578 600 Uncut dragonstone (m) 45–55 (noted) Rare 296,010–361,790 27,000–33,000 Loop half of a key (m) 1 Common 8,925 1 Tooth half of a key (m) 1 Common 8,981 1 Crystal triskelion fragment 1 (m) 1 Very rare Not sold Not alchemisable Crystal triskelion fragment 2 (m) 1 Very rare Not sold Not alchemisable Crystal triskelion fragment 3 (m) 1 Very rare Not sold Not alchemisable Dragon longsword (m) 1 Common 57,254 60,000 Off-hand dragon longsword (m) 1 Common 56,353 60,000 Dragon spear (m) 1 Rare 35,441 37,440 Battlestaff (m) 180–220 (noted) Rare 685,980–838,420 756,000–924,000 Rune javelin 5 Rare 930 1,870 Huge plated rune salvage 1 Uncommon 37,641 40,000 Huge plated rune salvage 18–22 (noted) Rare 677,538–828,102 720,000–880,000 Shield left half (m) 1 Rare 66,344 66,000 Dragon helm (m) 1 Uncommon 57,007 60,000 Rune arrowheads 113–137 Common 28,250–34,250 678–822 Onyx bolts (m) 135–165 Very rare 783,540–957,660 1,104,165–1,349,535 Water talisman 68–82 (noted) Rare 51,476–62,074 136–164 Earth talisman 68–82 (noted) Rare 13,940–16,810 136–164 Raw lobster 135–165 (noted) Common 69,120–84,480 22,950–28,050 Raw shark (m) 225–275 (noted) Uncommon 243,225–297,275 40,500–49,500 Big bones 68–82 (noted) Uncommon 22,848–27,552 68–82 Dragon bones 180–220 (noted) Rare 677,340–827,860 180–220 Drakolith stone spirit 25–35 Uncommon 4,825–6,755 Not alchemisable Necrite stone spirit 2 Common 506 Not alchemisable Phasmatite stone spirit 25–30 Uncommon 6,225–7,470 Not alchemisable Phasmatite stone spirit 2 Common 498 Not alchemisable Necrite stone spirit 25–30 Rare 6,325–7,590 Not alchemisable Runite stone spirit 3 Common 3,723 Not alchemisable Orichalcite stone spirit 25–35 Rare 4,425–6,195 Not alchemisable Lantadyme seed (m) 14–16 Uncommon 13,146–15,024 532–608 Dwarf weed seed (m) 14–16 Uncommon 87,584–100,096 532–608 Magic seed (m) 4 Uncommon 124,084 1,012 Palm tree seed (m) 10 Rare 28,090 1,520 Grimy torstol (m) 90–110 (noted) Uncommon 356,850–436,150 90–110 Grimy snapdragon (m) 90–110 (noted) Uncommon 116,100–141,900 90–110 Super restore (4) (m) 45–55 (noted) Uncommon 169,335–206,965 8,100–9,900 Prayer potion (4) 45–55 (noted) Uncommon 446,490–545,710 5,130–6,270 Flax 450–550 (noted) Common 44,550–54,450 1,350–1,650 Molten glass (m) 45–55 (noted) Common 40,455–49,445 45–55 Soft clay 450–550 (noted) Uncommon 831,150–1,015,850 450–550 Yew logs 68–82 (noted) Uncommon 23,052–27,798 6,528–7,872 Yew logs 675–825 (noted) Rare 228,825–279,675 64,800–79,200 Teak plank (m) 45–55 (noted) Uncommon 35,460–43,340 13,500–16,500 Mahogany plank (m) 270–330 (noted) Rare 595,620–727,980 243,000–297,000 Brawling gloves (Melee) (m) 1 Very rare 30,000 30,000 Brawling gloves (Magic) (m) 1 Very rare 30,000 30,000 Brawling gloves (Ranged) (m) 1 Very rare 30,000 30,000 Brawling gloves (Agility) (m) 1 Very rare 30,000 30,000 Brawling gloves (Cooking) (m) 1 Very rare 30,000 30,000 Brawling gloves (FM) (m) 1 Very rare 30,000 30,000 Brawling gloves (Fishing) (m) 1 Very rare 30,000 30,000 Brawling gloves (Hunter) (m) 1 Very rare 30,000 30,000 Brawling gloves (Mining) (m) 1 Very rare 30,000 30,000 Brawling gloves (Prayer) (m) 1 Very rare 30,000 30,000 Brawling gloves (Smithing) (m) 1 Very rare 30,000 30,000 Brawling gloves (Thieving) (m) 1 Very rare 30,000 30,000 Brawling gloves (WC) (m) 1 Very rare 30,000 30,000 Vecna skull (m) 1 Very rare 533,955 6,000 Cheese+tom batta (m) 1 Very rare 608 1 Blurberry Special (m) 1 Very rare 17,219 18 Hazelmere's signet ring (m) 1 Very rare 2,147,483,647 300,000

Universal drops

Universal drops are dropped by nearly every monster and skilling action outside of Daemonheim.

These items are dropped alongside main drops.

	Item	Quantity	Rarity	GE Price	High Alch
	Key token	1	Rare	Not sold	Not alchemisable
	Mimic kill token (m)	1	1/10000	67,111	Not alchemisable

Update history

This information has been compiled as part of the update history project. Some updates may not be included—see here for how to help out!

• patch 14 January 2013 (Update):
  • Giant rock crabs found in Waterbirth Island dungeons have had their combat level reduced down to 136.

• patch 9 November 2010 (Update):
  • Giant rock crabs no longer mysteriously grow when awakened.

• update 1 August 2005 (Update):
  • Added to game.

Trivia

• 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.