The solitary fish named Mambo stopped eating and seemed to be missing its human visitors—so aquarists attached photos of ...

a girl exclaims. “I think they’re just mesmerizing,” Jennie Janssen, the assistant curator who oversees the care of the aquarium’s jellyfish, tells me. “They don’t have a brain, ...

How do you perk up a lonely fish? This may sound like the start of a particularly silly joke, but it was a very real ...

Dora is among several new marine attractions at the National Zoo and Aquarium, which also include a circular jellyfish tank ...