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Lobstrosity
Lobstrosity
Release date 7 September 2017 (Update)
Members? Yes
Combat level 68
Always drops Raw lobster
Examine
An extremely vicious lobster type thing.
Combat info
Hitpoints 50
Aggressive Yes
Poisonous No
Max hit 9
Weakness Crush
Attack Styles
Melee (stab)
Slayer icon Slayer info
Not assigned
Combat icon Combat stats
Attack icon Strength icon Defence icon Magic icon Ranged icon
60 80 40 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
+30 +50 +15 +99 +70
Other bonuses Immunities
Attack icon
Strength icon
Ranged Strength icon
Magic Damage icon
Poison hitsplat
Venom hitsplat
+0 +0 +0 +0% Not immune Not immune
Attack speed
Monster attack speed 6

Lobstrosities are giant lobsters located in the southeast corner of the Underwater area of Fossil Island. Most weapons and shields cannot be equipped in this area. Weapons that can be equipped and used to kill lobstrosities include the trident of the seas/swamp, brine sabre, and Magic Secateurs.

A fishbowl helmet cannot be worn in this area, but players can easily use the nearby air bubbles to replenish oxygen while fighting lobstrosities.

DropsEdit

100%Edit

Item Quantity Rarity GE market price
Raw lobster Raw lobster 1 Always 249

RunesEdit

Item Quantity Rarity GE market price
Water rune Water rune 100 Common 600
Chaos rune Chaos rune 20 Uncommon 2,020
Nature rune Nature rune 10 Uncommon 2,420
Death rune Death rune 10 Uncommon 2,600

SeedsEdit

This monsters drops seeds from the allotment seed drop table.

Item Quantity Rarity GE market price
Seaweed spore 5 Seaweed spore 1–5 Uncommon 1,444–7,220
Limpwurt seed 5 Limpwurt seed 1 Uncommon 214
Strawberry seed 5 Strawberry seed 1 Uncommon 17
Herb seed 5 Marrentill seed 1 Uncommon 5
Jangerberry seed 5 Jangerberry seed 1 Uncommon 3
Herb seed 5 Tarromin seed 1 Uncommon 4
Wildblood seed 5 Wildblood seed 1 Uncommon 522
Watermelon seed 5 Watermelon seed 1 Rare 393
Herb seed 5 Harralander seed 1 Rare 31
Herb seed 5 Ranarr seed 1 Rare 41,531
Whiteberry seed 5 Whiteberry seed 1 Rare 76
Mushroom spore 5 Mushroom spore 1 Rare 63
Herb seed 5 Toadflax seed 1 Rare 4,678
Herb seed 5 Irit seed 1 Rare 80
Belladonna seed 5 Belladonna seed 1 Rare 111
Poison ivy seed 5 Poison ivy seed 1 Rare 538
Cactus seed 5 Cactus seed 1 Rare 237
Herb seed 5 Avantoe seed 1 Rare 1,420
Herb seed 5 Kwuarm seed 1 Rare 1,162
Herb seed 5 Snapdragon seed 1 Very rare 51,372
Herb seed 5 Cadantine seed 1 Very rare 978
Herb seed 5 Lantadyme seed 1 Very rare 2,155
Herb seed 5 Dwarf weed seed 1 Very rare 1,251
Herb seed 5 Torstol seed 1 Very rare 79,831

HerbsEdit

The herbs dropped vary between noted and unnoted.

Item Quantity Rarity GE market price
Grimy guam leaf Grimy guam leaf 1 Common 11
Grimy marrentill Grimy marrentill 1 Common 14
Grimy tarromin Grimy tarromin 1 Common 122
Grimy harralander Grimy harralander 1 Uncommon 623
Grimy ranarr weed Grimy ranarr weed 1 Uncommon 7,797
Grimy irit leaf Grimy irit leaf 1 Uncommon 871
Grimy avantoe Grimy avantoe 1 Uncommon 1,876
Grimy kwuarm Grimy kwuarm 1 Uncommon 1,776
Grimy cadantine Grimy cadantine 1 Uncommon 1,365
Grimy lantadyme Grimy lantadyme 1 Uncommon 1,549
Grimy dwarf weed Grimy dwarf weed 1 Uncommon 1,039

OtherEdit

Item Quantity Rarity GE market price
Numulite 25 Numulite 5–14 Common (9/35; 26%) 165–462
Coins 1000 Coins 1,000 Common Not sold
Pufferfish Pufferfish 1 Common Not sold
Seaweed Seaweed 6 (noted) Uncommon 306
Giant seaweed Giant seaweed 6 (noted) Uncommon 4,002
Toad's legs Toad's legs 2 (noted) Uncommon 812
Caviar Caviar 2 (noted) Uncommon 300
Oyster pearls Oyster pearls 1 Uncommon 695
Unidentified small fossil Unidentified small fossil 1 Uncommon (1/70=1.4%) Not sold
Unidentified medium fossil Unidentified medium fossil 1 Rare (1/140=0.71%) Not sold
Unidentified large fossil Unidentified large fossil 1 Rare (1/175=0.57%) Not sold
Unidentified rare fossil Unidentified rare fossil 1 Rare (1/700=0.14%) Not sold
Clue scroll (easy) Clue scroll (easy) 1 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 1,003
Uncut emerald Uncut emerald 1 Rare 1,016
Uncut ruby Uncut ruby 1 Rare 1,902
Nature talisman Nature talisman 1 Very rare 923
Uncut diamond Uncut diamond 1 Very rare 3,654
Rune javelin Rune javelin 5 Very rare 695
Loop half of key Loop half of key 1 Very rare 9,181
Tooth half of key Tooth half of key 1 Very rare 13,715
Rune spear Rune spear 1 Very rare 12,113
Shield left half Shield left half 1 Very rare 65,497
Dragon spear Dragon spear 1 Very rare 36,973


TriviaEdit

  • Lobstrosity could be a reference to The Dark Tower series by Stephen King where creatures of the same name appear in the second book, The Drawing of the Three.
  • Upon release, lobstrosities only dropped a maximum of 1 seaweed spore. This was increased to 5 in an update on 12 July 2018.