Haliclystus antarcticus is a stalked jellyfish which lives on rocky shore lines in the Southern hemisphere.

In very young individuals (just after metamorphosis to medusae) they are circular, in juveniles they are triangular, in older organisms they are shaped like the figure '8' and have a longitudinal furrow and a wrinkled surface.

[4] The greatest proportion of the food of individuals from Chile appeared to be harpacticoid copepods followed by gammarid amphipods, chironomid fly larvae and podocopid ostracods.

The remainder of the diet included empidid fly larvae, polychaete worms, isopods, juvenile decapod crustaceans and gastropods.

Smaller adult individuals from the Chile population appeared to eat mostly copepods, while larger animals ate mostly amphipods.

[5] A recent genetic analysis has suggested that Microhydrula limopsicola, originally classified as a member of the order Limnomedusae, is in fact a developmental stage of Haliclystus antarcticus.

[1] In its mature form H. antarcticus has eight gonads which are organised into four pairs and run from the central mouth to the ends of the arms.