Giant Rock Crab

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Giant Rock Crab
Release			1 August 2005 (Update)
Members			Yes
Examine
• No one likes crabs... especially really big ones! (after being approached) • Heavy rock! (when disguised as a boulder)
Combat info
Level			LP			XP			XP
95			3,400			399			131.6
Equipment XP (2H/MH & Armour/OH)
23 / 15 / 7
Aggressive						Poisonous
Offensive
Max hit
272			0			0			0
Style						Rate
						6 ticks (3.6s)
Combat levels
68				1				1
Accuracy
1409				0				0
Defensive
Armour				Weakness			Susceptible
1409		68
Affinities
90			55			45			65
Immunities
Not immune			Not immune			Not immune			Not immune
Advanced data
NPC ID				2452
Links				bestiary • MRND
FAQ • doc

trueNot immunetrueNot immunetrueNot immunetrueNot immunetrue? (edit)0? (edit)06868? (edit)06868111127227200000014091409000014091409555545456565? (edit)false9595File:Attack-icon.pngmeleemelee3,4003400399399131.6? (edit)? (edit)? (edit)23 / 15 / 7magicFile:Fire weakness icon.pngfire9090inquisitorNone? (edit)true1 August 2005 (Update)? (edit)Yes• No one likes crabs... especially really big ones! (after being approached)
• Heavy rock! (when disguised as a boulder)? (edit)

6 ticks (3.6s)

Giant Rock Crab? (edit)? (edit)? (edit) Giant Rock Crab? (edit)? (edit)? (edit)? (edit)surface? (edit)? (edit)24522452bestiary • MRND? (edit){"ranged":1,"attack":68,"acc_ranged":0,"acc_magic":0,"acc_melee":1409,"name":"Giant Rock Crab","max_spec":0,"aff_ranged":45,"max_melee":272,"defence":68,"max_ranged":0,"id":"2452","armour":1409,"aff_melee":55,"aff_magic":65,"release_date":"1 August 2005","examine":"'''&bull;''' No one likes crabs... especially really big ones! ''(after being approached)''<br />\n'''&bull;''' Heavy rock! ''(when disguised as a boulder)''","aggressive":true,"release_update_post":"Waterbirth Island","aff_weakness":90,"style":"[[File:Attack-icon.png¦25px¦link=Melee]]","lifepoints":3400,"max_magic":0,"members":"Yes","weakness":"[[File:Fire weakness icon.png¦25px¦link=Fire spells]]","level":95,"magic":1,"poisonous":false,"experience":399}

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	95		3	Maplink
Chaos Tunnels	95		0	Maplink

Drops

100% drop

	Item		Quantity	Rarity	GE price	High Alch
	Bones		1	Always	713	0

Charms

Nothing	1	1	1	1
2–3%	78–80%	9–10%	6–7%	2%
Represents a 90% confidence range based on a sample of 6,322 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	19-741	3-117
	Earth rune		1–40	Common	18-720	3-120
	Air talisman		1	Uncommon	574	2
	Mind talisman		1	Uncommon	237	2
	Fire talisman		1	Uncommon	278	2
	Cosmic talisman (m)		1	Rare	738	2
	Body talisman		1	Rare	610	2
	Water talisman		1	Uncommon	3,810	2
	Earth talisman		1	Uncommon	132	2
	Nature talisman (m)		1	Rare	1,692	2
	Chaos talisman (m)		1	Uncommon	2,457	2
	Huge plated steel salvage		1	Common	2,249	1,200
	Black claw		1	Common	3,994	108
	Off-hand black claw		1	Common	1,917	108
	Black platebody		1	Common	3,384	2,304
	Tiny bladed mithril salvage		1	Common	1,609	600
	Rock-shell gloves (m)		1	Uncommon	6,873	390
	Rock-shell boots (m)		1	Uncommon	6,050	390
	Black warhammer		1	Uncommon	4,053	764
	Off-hand black warhammer		1	Uncommon	2,626	764
	Small bladed adamant salvage		1	Uncommon	3,210	4,000
	Medium blunt adamant salvage		1	Rare	14,573	6,000
	Poison ivy seed (m)		1	Uncommon	227	99
	Belladonna seed (m)		1	Uncommon	1,103	106
	Guam seed (m)		1	Uncommon	217	2
	Marrentill seed (m)		1	Uncommon	188	3
	Tarromin seed (m)		1	Uncommon	215	4
	Harralander seed (m)		1	Uncommon	347	7
	Toadflax seed (m)		1	Uncommon	3,003	20
	Ranarr seed (m)		1	Rare	1,007	11
	Irit seed (m)		1	Rare	803	38
	Avantoe seed (m)		1	Rare	588	38
	Snapdragon seed (m)		1	Rare	581	38
	Cadantine seed (m)		1	Rare	1,291	38
	Lantadyme seed (m)		1	Rare	677	38
	Kwuarm seed (m)		1	Rare	11,397	38
	Dwarf weed seed (m)		1	Very rare	3,559	38
	Torstol seed (m)		1	Very rare	777	38
	Grimy guam		1	Uncommon	594	18
	Grimy marrentill (m)		1	Uncommon	3,418	0
	Grimy tarromin		1	Uncommon	199	0
	Grimy harralander (m)		1	Uncommon	1,040	0
	Grimy ranarr (m)		1	Rare	2,378	0
	Grimy irit (m)		1	Rare	4,768	0
	Grimy avantoe (m)		1	Rare	1,241	0
	Grimy kwuarm (m)		1	Rare	10,577	0
	Grimy cadantine (m)		1	Rare	5,903	0
	Grimy lantadyme (m)		1	Rare	7,769	0
	Grimy dwarf weed (m)		1	Rare	11,023	0
	Coins		23–137	Common	23-137	23-137
	Raw lobster		1	Common	373	170
	Raw bass (m)		1	Common	1,560	168
	Tinderbox		1	Common	320	0
	Casket (m)		1	Rare	719	30
	Rock-shell splinter (m)		1	Uncommon	3,384	36
	Rock-shell chunk (m)		1	Rare	1,892	36
	Rock-shell shard (m)		1	Rare	4,279	36

Tertiary drops

	Item		Quantity	Rarity	GE price	High Alch
	Sealed clue scroll (medium) (m)		1	1/128	Not sold	Not alchemisable
	Starved ancient effigy (m)		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 such as a ring of Wealth or luck of the Dwarves are not required to access the table.

Rare drop table:

Rare drop table Item Quantity Rarity GE price High alch value Coins 250–500 Common 250-500 250-500 Uncut sapphire 1 Common 959 15 Uncut emerald 1 Common 2,948 30 Uncut ruby 1 Common 2,450 60 Uncut diamond 1 Common 6,968 120 Uncut diamond 45–55 (noted) Rare 313,560-383,240 5,400-6,600 Loop half of a key (m) 1 Common 15,895 0 Tooth half of a key (m) 1 Common 15,760 0 Uncut dragonstone (m) 1 Uncommon 12,037 600 Uncut dragonstone (m) 45–55 (noted) Rare 541,665-662,035 27,000-33,000 Dragon longsword (m) 1 Common 58,018 60,000 Off-hand dragon longsword (m) 1 Common 57,756 60,000 Dragon spear (m) 1 Rare 35,081 37,440 Battlestaff (m) 180–220 (noted) Rare 561,780-686,620 756,000-924,000 Rune javelin 5 Rare 890 1,870 Huge plated rune salvage 1 Uncommon 38,850 40,000 Huge plated rune salvage 18–22 (noted) Rare 699,300-854,700 720,000-880,000 Shield left half (m) 1 Rare 68,815 66,000 Dragon helm (m) 1 Uncommon 58,743 60,000 Rune arrowheads 113–137 Common 16,272-19,728 678-822 Onyx bolts (m) 135–165 Very rare 1,033,155-1,262,745 1,104,165-1,349,535 Water talisman 68–82 (noted) Rare 259,080-312,420 136-164 Earth talisman 68–82 (noted) Rare 8,976-10,824 136-164 Raw lobster 135–165 (noted) Common 50,355-61,545 22,950-28,050 Raw shark (m) 225–275 (noted) Uncommon 436,950-534,050 40,500-49,500 Big bones 68–82 (noted) Uncommon 16,456-19,844 0 Dragon bones 180–220 (noted) Rare 343,080-419,320 0 Drakolith stone spirit (m) 25–35 Uncommon 16,375-22,925 Not alchemisable Necrite stone spirit (m) 2 Common 6,472 Not alchemisable Phasmatite stone spirit (m) 25–30 Uncommon 15,675-18,810 Not alchemisable Phasmatite stone spirit (m) 2 Common 1,254 Not alchemisable Necrite stone spirit (m) 25–30 Rare 80,900-97,080 Not alchemisable Runite stone spirit 3 Common 5,517 Not alchemisable Orichalcite stone spirit (m) 25–35 Rare 10,600-14,840 Not alchemisable Grimy torstol (m) 90–110 (noted) Uncommon 516,420-631,180 0 Grimy snapdragon (m) 90–110 (noted) Uncommon 176,760-216,040 0 Super restore (4) (m) 45–55 (noted) Uncommon 107,370-131,230 8,100-9,900 Prayer potion (4) 45–55 (noted) Uncommon 176,895-216,205 5,130-6,270 Lantadyme seed (m) 14–16 Uncommon 9,478-10,832 532-608 Dwarf weed seed (m) 14–16 Uncommon 49,826-56,944 532-608 Magic seed (m) 4 Uncommon 124,316 1,012 Palm tree seed (m) 10 Rare 243,600 1,520 Flax 450–550 (noted) Common 53,550-65,450 1,350-1,650 Molten glass (m) 45–55 (noted) Common 31,050-37,950 45-55 Soft clay 450–550 (noted) Uncommon 376,650-460,350 450-550 Yew logs 68–82 (noted) Uncommon 16,252-19,598 6,528-7,872 Yew logs 675–825 (noted) Rare 161,325-197,175 64,800-79,200 Teak plank (m) 45–55 (noted) Uncommon 26,865-32,835 13,500-16,500 Mahogany plank (m) 270–330 (noted) Rare 582,120-711,480 243,000-297,000 Vecna skull (m) 1 Rare 202,485 6,000 Blurberry Special (m) 1 Very rare 11,522 18 Cheese+tom batta (m) 1 Very rare 436 1 Hazelmere's signet ring (m) 1 Very rare 1,535,207,358 300,000 Brawling gloves (Melee) (m) 1 Very rare Not sold Not alchemisable Brawling gloves (Magic) (m) 1 Very rare Not sold Not alchemisable Brawling gloves (Ranged) (m) 1 Very rare Not sold Not alchemisable Brawling gloves (Agility) (m) 1 Very rare Not sold Not alchemisable Brawling gloves (Cooking) (m) 1 Very rare Not sold Not alchemisable Brawling gloves (FM) (m) 1 Very rare Not sold Not alchemisable Brawling gloves (Fishing) (m) 1 Very rare Not sold Not alchemisable Brawling gloves (Hunter) (m) 1 Very rare Not sold Not alchemisable Brawling gloves (Mining) (m) 1 Very rare Not sold Not alchemisable Brawling gloves (Prayer) (m) 1 Very rare Not sold Not alchemisable Brawling gloves (Smithing) (m) 1 Very rare Not sold Not alchemisable Brawling gloves (Thieving) (m) 1 Very rare Not sold Not alchemisable Brawling gloves (WC) (m) 1 Very rare Not sold Not alchemisable 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

Universal drops

Universal drops are dropped by nearly every monster 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	Very rare	7,887	Not alchemisable

Update history

The update history project is a work-in-progress – not all updates to this topic may be covered below. 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.

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.