The invention relates to the technical field of microorganisms, and provides heteromorpha sp. RXH-HY13 and application of the heteromorpha sp. RXH-HY13. The invention provides a dysococcus globosum RXH-HY13, which is preserved in the China Center for Type Culture Collection on July 11, 2024, the preservation number of the dysococcus globosum RXH-HY13 is CCTCC NO: M 20241535, and the preservation number of the dysococcus globosum RXH-HY13 is CCTCC NO: M 20241535. The invention also provides an application of the special-shaped
algae RXH-HY13. The special-shaped
algae RXH-HY13 is used for enriching at least one of organic
selenium and
carotenoid in a
selenium ion stress environment; the invention also provides another application of the heteromorphic
algae RXH-HY13. The application comprises the step that the heteromorphic algae RXH-HY13 is used for preparing a product rich in at least one of organic
selenium and
carotenoid. The special-shaped algae RXH-HY13 provided by the invention has certain tolerance to a selenium
ion stress environment, so that the special-shaped algae RXH-HY13 not only can enrich organic selenium in the selenium
ion stress environment, but also can promote accumulation of various carotenoids, and has the effect of synergistically enriching the organic selenium and the various carotenoids.