Staurozoa are Cnidarian, containing roughly 50 species commonly known as stalked jellyfishes or stauromedusae (the Greek roots stauro‐ and ‐medusa for cross‐shaped and the gorgon with snakes for hair, respectively). Staurozoans are smallish animals (1‐4 cm) that live in marine environments, usually attached to seaweeds, rocks, or gravel. All staurozoans possess a stalk (also known as a peduncle) for adhering to substrates. The rest of the staurozoan body is called the calyx.

These Haliclystus sp were found attached in seaweed in shallow waters in Punta Choro, Northern Chile