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Rock lobster

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Invasion plans
This article has a strategy guide here.
All information on mechanics and strategy will be on this page.

Rock lobsters are found in the Waterbirth Island Dungeon's fifth sub-level, in room 16. They are similar to Giant Rock Crabs in the fact that they are initially disguised as large rocks, but they will attack the player as they approach. They have very high defence (though they are weak to magic attacks) and can hit up to 150 life points, but rarely hit over 110 life points. Their attack speed is two bars faster than the Abyssal whip's (as fast as darts on rapid fire), making them incredibly dangerous. Rock lobsters are commonly killed by wealthy players because of their common crimson charm drops. However with the use of charged battle robes, a reward from the Fist of Guthix minigame, the price is significantly decreased. Using the right technique, such as ice bursting or ice barraging, killing rock lobsters is one of (if not) the fastest way(s) to obtain charms in RuneScape.

Obtaining crimson charms

An effective but expensive method of killing rock lobsters is using the Ancient Magicks spells Ice Burst or Ice Barrage.






Item Quantity Rarity GE market price
Earth runeEarth runeUnknownCommon9
Water runeWater runeUnknownCommon12
Pure essencePure essence4; 8Common104–208



Item Quantity Rarity GE market price
Fire talismanFire talisman1Uncommon1,811
Air talismanAir talisman1Uncommon161
Cosmic talismanCosmic talisman1Uncommon303
Body talismanBody talisman1Uncommon181
Water talismanWater talisman1Uncommon8,699
Charm drop numbers
No charmGold charmGreen charmCrimson charmBlue charm
Represents a 90% confidence range.
Based on a sample of 3,816 kills.
2 charms are dropped at a time.
Add data to the log
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Item Quantity Rarity GE market price
Grimy guamGrimy guam1Uncommon273
Grimy marrentillGrimy marrentill1Uncommon202
Grimy tarrominGrimy tarromin1Uncommon45
Grimy harralanderGrimy harralander1Uncommon130
Grimy ranarrGrimy ranarr1Uncommon2,285
Grimy iritGrimy irit1Uncommon1,957
Grimy avantoeGrimy avantoe1Uncommon4,194
Grimy kwuarmGrimy kwuarm1Uncommon4,731
Grimy cadantineGrimy cadantine1Uncommon3,853
Grimy lantadymeGrimy lantadyme1Uncommon5,275
Grimy dwarf weedGrimy dwarf weed1Uncommon5,485



Item Quantity Rarity GE market price
Steel arrow 5Steel arrow4–7Common52–91
Iron arrow 5Iron arrow2–17Common16–136
File:Fremmyshirt brown.pngFremennik shirt (brown)1Rare84
Fremennik bladeFremennik blade1RareNot sold



Item Quantity Rarity GE market price
Onion seed 5Onion seed1Uncommon4
Potato seed 5Potato seed1Uncommon10
Cabbage seed 5Cabbage seed1Uncommon10
Tomato seed 5Tomato seed1Uncommon2
Watermelon seed 5Watermelon seed1–3Very rare1,162–3,486
Evil turnip seed 5Evil turnip seed1Very rare47


Rare drop table drops

This monster has access to the rare drop table.
The ring of wealth is not required to access the table.
Item Quantity Rarity GE market price
Edible seaweedEdible seaweed4Common1,628
Raw lobsterRaw lobster1Common182
Lobster potLobster pot1Common98
AshesSoda ash1Uncommon23
Coins 250Coins355UncommonNot sold
Snape grassSnape grass1Uncommon25
Clue scrollClue scroll (medium)1RareNot sold
Spin ticketSpin ticket1RareNot sold
Court summonsCourt summons1Very rareNot sold
Ancient effigyStarved Ancient Effigy1Very rareNot sold
Show/hide rare drop table
Item Quantity Rarity GE market price
Coins 1000Coins250–500; 3,000CommonNot sold
Uncut sapphireUncut sapphire1Common778
Uncut emeraldUncut emerald1Common1,495
Uncut rubyUncut ruby1Common2,431
Uncut diamondUncut diamond1Common3,853
Uncut diamondUncut diamond45–55 (noted)Rare173,385–211,915
Loop half of a keyLoop half of a key1Uncommon14,497
Tooth half of a keyTooth half of a key1Uncommon35,956
Uncut dragonstoneUncut dragonstone1Uncommon11,140
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare501,300–612,700
Dragon longswordDragon longsword1Common56,937
Dragon spearDragon spear1Uncommon36,011
BattlestaffBattlestaff180–220 (noted)Uncommon1,303,380–1,593,020
Rune javelinRune javelin5Rare915
Rune platebodyRune platebody1Uncommon38,026
Rune platebodyRune platebody15–25 (noted)Rare570,390–950,650
Shield left halfShield left half1Uncommon65,002
Dragon helmDragon helm1Uncommon59,090
Rune arrowheads 5Rune arrowheads113–137Common23,278–28,222
Onyx bolts 5Onyx bolts135–165Rare1,126,575–1,376,925
Vecna skullVecna skull1Uncommon41,288
Chaos talismanChaos talisman1Uncommon714
Nature talismanNature talisman1Uncommon634
Water talismanWater talisman65–82 (noted)Rare565,435–713,318
Earth talismanEarth talisman65–82 (noted)Rare141,505–178,514
Fire talismanFire talisman25–35 (noted)Rare45,275–63,385
Raw lobsterRaw lobster135–165 (noted)Uncommon24,570–30,030
Raw sharkRaw shark225–275 (noted)Uncommon206,100–251,900
Big bonesBig bones79–90 (noted)Uncommon29,467–33,570
Dragon bonesDragon bones180–220 (noted)Uncommon372,960–455,840
CoalCoal200–1,100 (noted)Uncommon74,000–407,000
Gold oreGold ore90–110 (noted)Common11,700–14,300
Adamantite oreAdamantite ore180–220 (noted)Uncommon236,160–288,640
Adamant barAdamant bar15 (noted)Common36,780
Adamant barAdamant bar135–165 (noted)Rare331,020–404,580
Runite oreRunite ore90–110 (noted)Rare941,310–1,150,490
Rune barRune bar3 (noted)Common42,636
Rune barRune bar45–55 (noted)Rare639,540–781,660
Grimy torstolGrimy torstol90–110 (noted)Uncommon405,900–496,100
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon343,260–419,540
Super restore (4)Super restore (4)45–55 (noted)Uncommon168,390–205,810
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon98,100–119,900
Herb seed 5Lantadyme seed14–16Uncommon82,502–94,288
Herb seed 5Dwarf weed seed14–16Uncommon115,486–131,984
Magic seed 5Magic seed4Uncommon430,364
Palm tree seed 5Palm tree seed10Rare1,853,020
FlaxFlax450–550 (noted)Common9,000–11,000
Molten glassMolten glass45–55 (noted)Common5,355–6,545
Soft claySoft clay450–550 (noted)Uncommon117,450–143,550
Yew logsYew logs68–82Uncommon15,708–18,942
Yew logsYew logs675–825 (noted)Rare155,925–190,575
Teak plankTeak plank45–55 (noted)Uncommon27,315–33,385
Mahogany plankMahogany plank270–330 (noted)Rare545,400–666,600
Brawling gloves (Melee)Brawling gloves (Melee)1RareNot sold
Brawling gloves (Magic)Brawling gloves (Magic)1RareNot sold
Brawling gloves (Ranged)Brawling gloves (Ranged)1RareNot sold
Brawling gloves (Agility)Brawling gloves (Agility)1RareNot sold
Brawling gloves (Cooking)Brawling gloves (Cooking)1RareNot sold
Brawling gloves (FM)Brawling gloves (FM)1RareNot sold
Brawling gloves (Fishing)Brawling gloves (Fishing)1RareNot sold
Brawling gloves (Hunter)Brawling gloves (Hunter)1RareNot sold
Brawling gloves (Mining)Brawling gloves (Mining)1RareNot sold
Brawling gloves (Prayer)Brawling gloves (Prayer)1RareNot sold
Brawling gloves (Smithing)Brawling gloves (Smithing)1RareNot sold
Brawling gloves (Thieving)Brawling gloves (Thieving)1RareNot sold
Brawling gloves (WC)Brawling gloves (WC)1RareNot sold
Crystal triskelion fragment 1Crystal triskelion fragment 11Very rareNot sold
Crystal triskelion fragment 2Crystal triskelion fragment 21Very rareNot sold
Crystal triskelion fragment 3Crystal triskelion fragment 31Very rareNot sold


  • The examine is likely a reference to the B-52's song "Rock Lobster".
  • After the ring of wealth update, the charm drop rates of hellhounds and rock lobsters had "gone walkabouts"[1]. This has now been fixed.
  • The rock lobster's combat level was changed from 127 to 156 in February 2011.
  • If you manage to get the Rock Lobster within a distance while you're running to another place, sometimes, the intact version (the disguised as a rock) will be seen moving.


  1. ^ Mod Sneakman. "answer to." 16 March 2011. Hellhounds Nerf? Forums.

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