Dunaliella salina is a type of microalgae found in highly saline environments, such as salt lakes and salt flats. It is known for its ability to thrive in extreme conditions, where most other organisms cannot survive. This green microalga is notable for its high content of beta-carotene, a pigment that gives it a reddish hue and is a precursor to vitamin A. Due to its rich nutrient profile, Dunaliella salina is often harvested for use in dietary supplements and cosmetics. Its ability to produce large amounts of beta-carotene makes it a valuable resource in the food and health industries, contributing to its growing popularity.