Jellyfish Dossier


Pacific sea nettle (Chrysaora fuscescens)

Common Name Cnidaria
Group Invertebrates
Species Cnidaria omnimorph
Time Cambrian - Holocene
Diet Carnivore
Temperament Passive, but aggressive at close range
PC Release Date Not Yet Released
Tameable No
Rideable No

Cnidaria Omnimorph is another example of a creature which should not exist. It has traits that seem to come from many types of jellyfish. It possesses the size and shape of large egg-yolk jellies, the powerful sting of certain box jellies, and the bioluminescence of of deep-sea jellies. This all combines to make a dangerous creature that lights up the deepest reaches of the ocean.

Cnidaria is not generally an aggressive creature, because it lacks normal perceptive senses. It generally just floats on the current until something gets close enough to sense, at which point it attacks. While its attacks are not directly powerful, its sting injects an incredibly strong and fast-acting sedative.


As Cnidaria is barely more intelligent than a plant, there's no effective method to tame one. Though as dangerous as they can be, a few tribes even keep schools of them around to harvest.

Most tribes kill Cnidaria on sight, then collect its reserve of powerful sedative, to use in technically advanced long-distance tranquilizers.

— The Dossier

The Cnidaria is a small carnivorous invertebrate found in the oceans of the Ark.

Wikipedia has a more detailed and comprehensive article on Cnidaria






  • The dossier was revealed on September 30, 2015.
  • The dossier states that Cnidaria could be harvested and used for "technically advanced long-distance tranquillizers", suggesting that it may be used to craft tranquillizer darts used in the Fabricated Sniper Rifle.

Trivia not relevant for the game

  • Cnidaria is actually the name of the phylum containing all jellyfish - plus corals, anemones, and others.
  • Cnidaria's genus name comes from the Greek word 'knide,' meaning 'knettle.' Its species name consists of the words 'omni,' meaning 'all' or 'of every kind;' and 'multi,' meaning 'more than one.' This refers to the fact that it resembles many different species of jellyfish rather than just one kind.


Gameplay Images



Patch 253 Cnidaria, Pegomastax, Therizinosaurus, Troodon, Tusoteuthis, & More!

Patch 253 Cnidaria, Pegomastax, Therizinosaurus, Troodon, Tusoteuthis, & More!