Haloquadratum walsbyi
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Haloquadratum walsbyi is a species of Archaea in the genus Haloquadratum, known for its square shape and halophilic nature.
Microscopic image from the hypersaline Lake Tyrrell, in which orange chlorophyte Dunaliella salina can be tentatively identified, accompanied by a number of smaller Haloquadratum walsbyi, showing their flat square-shaped cells.
Dunaliella salina
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Dunaliella salina is a type of halophile unicellular green algae especially found in hypersaline environments, such as salt lakes and salt evaporation ponds. Known for its antioxidant activity because of its ability to create a large amount of carotenoids, it is responsible for most of the primary production in hypersaline environments worldwide, and is also used in cosmetics and dietary supplements.
Salt ponds in San Francisco Bay
Dunaliella salina orange-colored water of the salt lake Sivash, Crimea