It could be anything, from a coelenterate-grade or sponge-grade organism to even a protist or an alga.
I have been writing a series of articles on alleged Ediacaran animals that have been postulated as precursors of the Cambrian explosion.
Darwinists have to face the fact that a core prediction of their theory miserably failed an important empirical test.
Evolutionists would expect to find sponges as the earliest animals in the fossil record.
Ikaria wariootia is just another problematic Ediacaran fossil that could be anything from inorganic artifact to protozoan to cnidarian and yes, maybe a bilaterian worm.