Cassiopea ornata is a benthic scyphozoan jellyfish (family Cassiopeidae) closely related to C. The species shows variable morphology and is one of several Cassiopea taxa subject to taxonomic revision using molecular data. Its pulsating movement facilitates water circulation and nutrient acquisition even in the sedentary, inverted posture. Genomic data have been generated for this species and are available in public databases, enabling comparative studies of cnidarian evolution and ecology.