Giant rock crab
Giant Rock Crab
Release date 1 August 2005 (Update)
Members? Yes
Combat level 137
Always drops Bones
No one likes crabs... especially really big ones!
Disguised as a boulder:
Heavy rock!
Combat info
Hitpoints 180
Aggressive Yes
Poisonous No
Max hit 9
Weakness Magic
Attack Styles
Melee (crush)
Slayer icon Slayer info
Not assigned
Combat icon Combat stats
Attack icon Strength icon Defence icon Ranged icon Magic icon
50 80 200 1 1
Attack icon Aggressive stats
White dagger White scimitar White warhammer Magic icon Ranged icon
+0 +0 +0 +0 +0
Defence icon Defensive stats
White dagger White scimitar White warhammer Magic icon Ranged icon
+225 +200 +175 -10 +250
Other bonuses Immunities
Strength icon Ranged Strength icon Attack icon Poison hitsplat Venom hitsplat
+0  ? +0 Not immune Not immune
Attack speed
Monster attack speed 6

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 cast a spell on them gives the message "You can't attack this NPC."

Giant rock crabs are only initially aggressive if they are approached while dormant. Once they are moving and the targeted player is out of range, they stop being aggressive and will ignore players that don't attack them. They eventually become dormant boulders again after a while if they are not attacked.



The giant rock crab is one of few monsters in RuneScape that will retreat from battle when they become critically wounded. This can be troublesome, as they are found in a single-way combat area. This can be prevented by attacking them while their back is turned to a nearby wall, so that they move away from the player and back up into the wall. If they move too far away, the player will follow them and risk being attacked by another rock crab. There are several protruding sections of the walls in the area that can be used as safespots which are ideal as the crabs' main weakness is magic.



Item Quantity Rarity GE market price
Bones Bones 1 Always 63


Item Quantity Rarity GE market price
Water rune Water rune 1–39 Uncommon 5–195
Earth rune Earth rune 2–37 Uncommon 10–185
Air talisman Air talisman 1 Rare 53
Mind talisman Mind talisman 1 Rare 286
Fire talisman Fire talisman 1 Rare 1,654
Cosmic talisman Cosmic talisman 1 Rare 289
Body talisman Body talisman 1 Rare 989
Water talisman Water talisman 1 Rare 144
Earth talisman Earth talisman 1 Rare 217


Item Quantity Rarity GE market price
Steel platebody Steel platebody 1 Uncommon 1,002
Black claws Black claws 1 Uncommon 1,308
Black platebody Black platebody 1 Uncommon 3,956
Mithril axe Mithril axe 1 Uncommon 190
Rock-shell gloves Rock-shell gloves 1 Uncommon 626
Rock-shell boots Rock-shell boots 1 Uncommon 599
Black warhammer Black warhammer 1 Rare 403
Adamant longsword Adamant longsword 1 Rare 1,715
Adamant warhammer Adamant warhammer 1 Rare 2,260


Item Quantity Rarity GE market price
Poison ivy seed 5 Poison ivy seed 1 Uncommon 452
Belladonna seed 5 Belladonna seed 1 Uncommon 58
Herb seed 5 Guam seed 1 Uncommon 8
Herb seed 5 Marrentill seed 1 Uncommon 5
Herb seed 5 Tarromin seed 1 Uncommon 7
Herb seed 5 Harralander seed 1 Uncommon 35
Herb seed 5 Toadflax seed 1 Rare 2,102
Herb seed 5 Ranarr seed 1 Rare 35,712
Herb seed 5 Irit seed 1 Rare 46
Herb seed 5 Avantoe seed 1 Rare 1,511
Herb seed 5 Snapdragon seed 1 Rare 46,269
Herb seed 5 Cadantine seed 1 Rare 850
Herb seed 5 Lantadyme seed 1 Rare 1,730
Herb seed 5 Dwarf weed seed 1 Very rare 514
Herb seed 5 Torstol seed 1 Very rare 69,123


Item Quantity Rarity GE market price
Grimy guam leaf Grimy guam leaf 1 Uncommon 10
Grimy marrentill Grimy marrentill 1 Uncommon 12
Grimy tarromin Grimy tarromin 1 Uncommon 148
Grimy harralander Grimy harralander 1 Uncommon 617
Grimy ranarr weed Grimy ranarr weed 1 Rare 7,220
Grimy irit leaf Grimy irit leaf 1 Rare 884
Grimy avantoe Grimy avantoe 1 Rare 2,250
Grimy kwuarm Grimy kwuarm 1 Rare 1,915
Grimy cadantine Grimy cadantine 1 Rare 1,278
Grimy lantadyme Grimy lantadyme 1 Rare 1,473
Grimy dwarf weed Grimy dwarf weed 1 Rare 564


Item Quantity Rarity GE market price
Coins 100 Coins 27; 28; 42; 70; 137 Common Not sold
Raw lobster Raw lobster 1 Common 165
Raw bass Raw bass 1 Common 113
Tinderbox Tinderbox 1 Common 92
Rock-shell splinter Rock-shell splinter 1 Uncommon (1/64) 22,408
Rock-shell chunk Rock-shell chunk 1 Uncommon (1/64) 12,129
Rock-shell shard Rock-shell shard 1 Uncommon (1/64) 21,958
Casket Casket 1 Rare 771
Clue scroll (medium) Clue scroll (medium) 1 Very rare Not sold

Gem drop table

In addition to the drops above, this monster has access to the gem drop table.

Show/hide gem drop table
Item Quantity Rarity GE market price
Uncut sapphire Uncut sapphire 1 Rare 837
Uncut emerald Uncut emerald 1 Rare 707
Uncut ruby Uncut ruby 1 Rare 1,494
Nature talisman Nature talisman 1 Very rare 722
Uncut diamond Uncut diamond 1 Very rare 3,101
Rune javelin Rune javelin 5 Very rare 705
Loop half of key Loop half of key 1 Very rare 6,502
Tooth half of key Tooth half of key 1 Very rare 14,891
Rune spear Rune spear 1 Very rare 11,993
Shield left half Shield left half 1 Very rare 65,284
Dragon spear Dragon spear 1 Very rare 37,781