archaea

Yes, archaea are prokaryotic.

Archaeon Archaea are heat-loving,salt-loving, and methane-making. Methane is a kind of gas frequently found in swamps. Heat-loving and salt-loving archaea are sometimes called extremophiles. Extremophileslive in places where conditions are extreme.

The Archaea /ɑrˈkiːə/ ( listen) are a group of single-celled microorganisms. A single individual or species from this domain is called an archaeon (sometimes spelled "archeon")