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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 runeUnknownCommon15
Water runeWater runeUnknownCommon20
Pure essencePure essence4; 8Common116–232



Item Quantity Rarity GE market price
Fire talismanFire talisman1Uncommon1,637
Air talismanAir talisman1Uncommon207
Cosmic talismanCosmic talisman1Uncommon448
Body talismanBody talisman1Uncommon271
Water talismanWater talisman1Uncommon8,125
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 guam1Uncommon227
Grimy marrentillGrimy marrentill1Uncommon202
Grimy tarrominGrimy tarromin1Uncommon54
Grimy harralanderGrimy harralander1Uncommon147
Grimy ranarrGrimy ranarr1Uncommon2,192
Grimy iritGrimy irit1Uncommon1,688
Grimy avantoeGrimy avantoe1Uncommon3,775
Grimy kwuarmGrimy kwuarm1Uncommon4,881
Grimy cadantineGrimy cadantine1Uncommon4,815
Grimy lantadymeGrimy lantadyme1Uncommon4,755
Grimy dwarf weedGrimy dwarf weed1Uncommon4,817



Item Quantity Rarity GE market price
Steel arrow 5Steel arrow4–7Common52–91
Iron arrow 5Iron arrow2–17Common16–136
File:Fremmyshirt brown.pngFremennik shirt (brown)1Rare81
Fremennik bladeFremennik blade1RareNot sold



Item Quantity Rarity GE market price
Onion seed 5Onion seed1Uncommon4
Potato seed 5Potato seed1Uncommon11
Cabbage seed 5Cabbage seed1Uncommon11
Tomato seed 5Tomato seed1Uncommon2
Watermelon seed 5Watermelon seed1–3Very rare1,508–4,524
Evil turnip seed 5Evil turnip seed1Very rare18


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 seaweed4Common1,668
Raw lobsterRaw lobster1Common169
Lobster potLobster pot1Common151
AshesSoda ash1Uncommon24
Coins 250Coins355UncommonNot sold
Snape grassSnape grass1Uncommon29
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 sapphire1Common856
Uncut emeraldUncut emerald1Common1,379
Uncut rubyUncut ruby1Common2,248
Uncut diamondUncut diamond1Common4,016
Uncut diamondUncut diamond45–55 (noted)Rare180,720–220,880
Loop half of a keyLoop half of a key1Uncommon16,893
Tooth half of a keyTooth half of a key1Uncommon31,815
Uncut dragonstoneUncut dragonstone1Uncommon11,442
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare514,890–629,310
Dragon longswordDragon longsword1Common57,820
Dragon spearDragon spear1Uncommon35,981
BattlestaffBattlestaff180–220 (noted)Uncommon1,296,720–1,584,880
Rune javelinRune javelin5Rare880
Rune platebodyRune platebody1Uncommon38,000
Rune platebodyRune platebody15–25 (noted)Rare570,000–950,000
Shield left halfShield left half1Uncommon64,611
Dragon helmDragon helm1Uncommon58,879
Rune arrowheads 5Rune arrowheads113–137Common22,261–26,989
Onyx bolts 5Onyx bolts135–165Rare1,143,855–1,398,045
Vecna skullVecna skull1Uncommon50,618
Chaos talismanChaos talisman1Uncommon762
Nature talismanNature talisman1Uncommon733
Water talismanWater talisman65–82 (noted)Rare528,125–666,250
Earth talismanEarth talisman65–82 (noted)Rare135,135–170,478
Fire talismanFire talisman25–35 (noted)Rare40,925–57,295
Raw lobsterRaw lobster135–165 (noted)Uncommon22,815–27,885
Raw sharkRaw shark225–275 (noted)Uncommon238,950–292,050
Big bonesBig bones79–90 (noted)Uncommon28,045–31,950
Dragon bonesDragon bones180–220 (noted)Uncommon471,600–576,400
CoalCoal200–1,100 (noted)Uncommon78,600–432,300
Gold oreGold ore90–110 (noted)Common11,790–14,410
Adamantite oreAdamantite ore180–220 (noted)Uncommon233,100–284,900
Adamant barAdamant bar15 (noted)Common39,690
Adamant barAdamant bar135–165 (noted)Rare357,210–436,590
Runite oreRunite ore90–110 (noted)Rare923,400–1,128,600
Rune barRune bar3 (noted)Common42,504
Rune barRune bar45–55 (noted)Rare637,560–779,240
Grimy torstolGrimy torstol90–110 (noted)Uncommon414,180–506,220
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon301,680–368,720
Super restore (4)Super restore (4)45–55 (noted)Uncommon196,650–240,350
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon114,570–140,030
Herb seed 5Lantadyme seed14–16Uncommon52,094–59,536
Herb seed 5Dwarf weed seed14–16Uncommon62,958–71,952
Magic seed 5Magic seed4Uncommon406,884
Palm tree seed 5Palm tree seed10Rare1,553,620
FlaxFlax450–550 (noted)Common9,900–12,100
Molten glassMolten glass45–55 (noted)Common5,715–6,985
Soft claySoft clay450–550 (noted)Uncommon152,100–185,900
Yew logsYew logs68–82Uncommon14,144–17,056
Yew logsYew logs675–825 (noted)Rare140,400–171,600
Teak plankTeak plank45–55 (noted)Uncommon28,440–34,760
Mahogany plankMahogany plank270–330 (noted)Rare551,880–674,520
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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