Lobstrosity

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.

Seaweed spores will spawn around the area randomly. Though not confirmed, it appears that by re-entering the area by using the the rift or underground tunnel after receiving three random seaweed spores spawns increases the amount of random seaweed spores that spawns afterwards.

100%

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Runes

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Seeds

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Herbs
The herbs dropped vary between noted and unnoted.


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Other

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Trivia

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