An organism new to science was discovered during your recent dive to the bottom of the pacific ocean the organism grows in colonies and is made up of the eukaryotic cells which domain would you place this organism in

The organism would be placed in the domain Eukarya.

The domain Eukarya contains all organisms (unicellular or multicellular) that are characterized by eukaryotic cells; cells that have a definite nucleus within which the cell’s genetic material is located along with other membrane bound organelles. The kingdoms in this domain include Plantae, Animalia, Protista, Chromista, and Fungi.

the backbone of the dna and rna compound is sugar phosphate.