Natural history

Cassiopea ornata jellyfish are seen in the Enoshima Aquarium in Fujisawa, south west of Tokyo, Japan. The aquarium displays various jellyfishes as its key feature.

Kimimasa Mayama/EPA

Cassiopea ornata jellyfish are seen in the Enoshima Aquarium in Fujisawa, southwest of Tokyo, Japan. The aquarium displays various jellyfishes as its key feature.