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search  Haloarchaea are microorganisms and members of the
halophile community, in that they require high salt
concentrations to grow. They are a distinct evolutionary branch
of the Archaea, and are generally considered extremophiles,
although not all members of this group can be considered as
such.  Salt ponds with pink colored Haloarchaea  Living
environment[edit]  Haloarchaea require salt concentrations in
excess of 2 M (or about 10%) to grow, and optimal growth usually
occurs at much higher concentrations, typically 20–25%. However,
Haloarchaea can grow up to saturation (about 37% salts).
Haloarchaea are found mainly in hypersaline lakes and solar
salterns. Their high densities in the water often lead to pink
or red colourations of the water (the cells possessing high
levels of carotenoid pigments, presumably for UV protection).[1]
Cellular shapes[edit]  Haloarchaea are often considered
pleomorphic, or able to take on a range of shapes—even withi