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Glowing jellyfish light up the waters

Kimimasa Mayama / EPA

A Moon Jellyfish swims in the water at a Tokyo aquarium, Japan, May 3. The Golden Week, a week-long national holiday period in Japan, takes place from April 28 to May 6.

Kimimasa Mayama / EPA

A mother and her baby watch Moon Jellyfish swimming in the water at a Tokyo aquarium, Japan, May 3.

Kimimasa Mayama / EPA

Moon Jellyfish swim in the water at a Tokyo aquarium, Japan, May 3.

Enjoy looking at jellyfish? Browse more pictures of them in PhotoBlog.