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Temporal range: Archaean – Recent
Halobacteria sp. strain NRC-1, each cell about 5 μm long.
Scientific classification
Domain: Archaea
Kingdom: Euryarchaeota
Phylum: Euryarchaeota

Haloarchaea are microorganisms that are members of the halophile community. They need a high salt concentrations to grow. They are a distinct evolutionary branch of the Archaea, and are extremophiles.

The term halobacteria is a misnomer (mistaken name), because we now know the archaea are a different group from bacteria.

Salt ponds with pink colored Haloarchaea

In taxonomy, the Haloarchaea are a class of the Euryarchaeota,[1] found in water with salt. They are common in most environments where large amounts of salt, moisture, and organic material are available.


  1. See the National Center for Biotechnology Information webpage on Halobacteria. Data extracted from the "NCBI taxonomy resources". NCBI. Retrieved 2007-03-19.