
A visitor looks at jellyfish swimming in a giant spherical tank at the World of Jellyfish aquarium in Prague, Czech Republic, February 3, 2020. (Photo/Agencies)

A visitor looks at jellyfish swimming in a giant spherical tank at the World of Jellyfish aquarium in Prague, Czech Republic, February 3, 2020. (Photo/Agencies)

Visitors look at jellyfish swimming in a giant spherical tank at the World of Jellyfish aquarium in Prague, Czech Republic, February 3, 2020. (Photo/Agencies)

A jellyfish swims in a giant spherical tank at the World of Jellyfish aquarium in Prague, Czech Republic, February 3, 2020.(Photo/Agencies)

Visitors look at jellyfish swimming in giant spherical tanks at the World of Jellyfish aquarium in Prague, Czech Republic, February 3, 2020. (Photo/Agencies)