Method for obtaining hydranths of mastigias papua

The invention relates to a method for obtaining hydranths of mastigias papua, and belongs to the field of artificial feeding and propagating of ornamental marine animals. The method comprises the steps of: culturing parents in a manner of completely being away from light, wherein the culturing water temperature is 25-28 DEG C, enabling the cultured parents to be fertilized, and when fertilized eggs grow into planula larvas floating and swimming on a water surface, taking out the parents; shifting the planula larvas into fresh seawater with the same temperature, at the same time, putting attaching pieces in the fresh seawater, wherein the putting density is that 400-600 planula larvas and two attaching pieces are put in each one liter of a container, and culturing the planula larvas at a constant temperature; when the planula larvas grow into the hydranths with 4 feelers in an attaching manner, beginning to feed the hydranths with artemia nauplii every day, after feeding the hydranths with the artemia nauplii for 2.5-3.5 hours, completely changing water, when the hydranths grow to have 16 feelers, controlling the culturing temperature to be 20-27 DEG C, and extending the number of the hydranths through asexual reproduction. According to the method disclosed by the invention, the hydranths of the mastigias papua can be cultured in batches, and the requirements of showing, enjoying and researching the hydranths of the mastigias papua can be met. The breeding blank of the mastigias papua is filled.