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|The following is based on Fallout 3 cut content and has not been confirmed by canon sources.|
After hours of study, you have managed to exploit the weaknesses of mirelurk and now have a damage bonus of 5 when you attack one.
Behind the scenes
The Mirelurk Ecology perk was meant to be obtained after reading a book titled Marsh Hunting Tips Vol IV: Mirelurks. How the book was to be obtained is not indicated. The book still exists within the add-on's resources and, if somehow obtained, will grant the perk when used. PC users can obtain the book by using the command player.additem xx00fc2f 1.
A similar book was created (and not used) for the Ghoul Ecology perk, titled "10 Indisputable Rules On Ghouls".
- Due to a misplaced condition, the Mirelurk Ecology perk has no effect. The perk is intended to check whether or not the creature being damaged is a mirelurk, but instead runs that check on the owner of the perk, i.e. the player.