50 Vault-Tec C.E.O.
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Catfish mirelurks are creatures found in the Capital Wasteland in 2277.


Nothing much is known about these sub-species of mirelurk, aside from that they attack fishermen whom travel out far enough, as well as disrupting the local ecosystem whenever they move their nests.



Humanoid, mutated catfish that are very territorial and aggressive. catfish mirelurks are always found in damp and aquatic areas, such as the mouth of the Potomac river, in the river itself, and around the dried up section of the Potomac river up north. If not in an aquatic habitat, they have been seen in dark, damp and cool areas like caves, metro tunnels, and derelict facilities that fit the description, such as the Anchorage Memorial. However, they do not reproach from light; they can be seen during the day, swimming in rivers and walking along the banks. This is especially true around Arefu, the Potomac, and the Anchorage War Memorial.

Gameplay attributes

While less armored than the standard variant of mirelurk, catfish mirelurks make up for this by being much swifter and with the unique ability to crawl on walls and ceilings; attacking their prey while they're unaware.

They are never encountered outside of the Mar'Jhan warrens.


  • While catfish mirelurks tend to crawl, they have been known to stand up on their back-legs, which shows that they are taller than a normal human.
  • Being dropped down upon by a catfish mirelurk that has been hanging to the ceiling will cause bonus damage against the Lone Wanderer.
    • However, shooting them before they can attack first will cause them to fall, stunning them momentarily.