Signature drop: Rock-shell boots

Giant Rock Crab

Giant Rock Crab is a level 75 members monster found in the Fremennik Province and the Wilderness, with 17,550 life points. It is weak to water spells. It is the top source of Black claw, Off-hand black claw and Rock-shell boots.

“No one likes crabs... especially really big ones!”

Level 75MembersAggressiveAttacks with melee

Updated 9 October 2026. Stats and drops from the RuneScape Wiki's monster and drop data (CC BY-NC-SA 3.0), checked 2026-10-09. Wiki page. Item sprites © Jagex.

Combat stats

Combat level: 75
Life points: 17,550
Combat XP per kill: 877.5
Max hit: 600
Armour: 1,694
Attack style: Melee
Weakness: Water
Aggressive: Yes
Poisonous: No

Slayer

Slayer level: None needed
Assigned by: Not a Slayer task

Where

Fremennik, Wilderness

Ironman notes

Weak to water spells: bring that style for faster kills.
Aggressive: it attacks on sight, which is handy for AFK kills once your gear outclasses it.
A herb source: it drops 11 kinds of grimy herb, useful for Herblore without farming runs.
Drops 13 kinds of seed, which keeps farm patches stocked.
Drops gold charm, green charm, crimson charm and blue charms for Summoning pouches.
Always drops Bones: Prayer XP as you go.
It can also roll the shared rare drop table (gems, key halves and bulk supplies); luck items improve those odds.

Best for

Only from this monster

No other monster drops these.

Best drop rate anywhere

Of every monster that drops these, this one gives the most per kill.

Black warhammer5/256
Off-hand black warhammer5/256

Drops (62)

Item	Quantity	Rarity
Coins	1–140	10/128
Gold charm#2 rate	3	762/1,000
Earth rune	1–40	10/128
Water rune	1–40	10/128
Bones#2 rate	1	Always
Rock crab carcassBest rate	1	Always
Green charm	3	95.3/1,000
Crimson charm	3	63.5/1,000
Raw bass#2 rate	1	10/128
Raw lobster	1	10/128
Tinderbox	1	10/128
Tiny bladed mithril salvageBest rate	1	10/128
Blue charm	3	19/1,000
Black platebody	1	5/128
Huge plated steel salvage	1	5/128
Small bladed adamant salvage	1	5/128
Black clawOnly source	1	5/256
Black warhammerBest rate	1	5/256
Off-hand black clawOnly source	1	5/256
Off-hand black warhammerBest rate	1	5/256
Casket#2 rate	1	2/128
Grimy guam	1	1/64
Rock-shell bootsOnly source	1	2/128
Rock-shell chunkOnly source	1	2/128
Rock-shell glovesOnly source	1	2/128
Rock-shell shardOnly source	1	2/128
Rock-shell splinterOnly source	1	2/128
Grimy marrentill	1	1/85.3
Air talisman	1	1/89.6
Body talisman	1	1/89.6
Earth talisman	1	1/89.6
Fire talisman	1	1/89.6
Mind talisman	1	1/89.6
Water talisman	1	1/89.6
Grimy tarromin	1	1/113.8
Sealed clue scroll (medium)	1	1/128
Grimy harralander	1	1/146.3
Grimy ranarr	1	1/186.2
Cosmic talisman	1	1/224
Grimy irit	1	1/256
Chaos talisman	1	1/298.7
Nature talisman	1	1/298.7
Grimy avantoe	1	1/341.3
Grimy kwuarm	1	1/409.6
Grimy cadantine	1	1/512
Toadflax seed	1	1/595.3
Grimy dwarf weed	1	1/682.7
Grimy lantadyme	1	1/682.7
Cave nightshade seed	1	1/882.8
Irit seed	1	1/882.8
Avantoe seed	1	1/1,280
Poison ivy seed	1	1/1,280
Cactus seed	1	1/1,347.4
Kwuarm seed	1	1/1,828.6
Snapdragon seed	1	1/2,844.4
Cadantine seed	1	1/4,266.7
Dwarf weed seed	1	1/8,533.3
Lantadyme seed	1	1/8,533.3
Spirit weed seed	1	1/8,533.3
Mimic kill token	1	1/9,925
Torstol seed	1	1/12,800
Starved ancient effigy	1	1/32,870

Most common first. “Best rate” and “#2/#3 rate” compare expected drops per kill with every other monster that drops the item. Rare drop table items are not repeated here.