zoos zoos

A curious cuttlefish stares back at the camera from inside The Smithsonian's National Zoo Invertebrate Exhibit. The exhibit, home to dozens of small aquatic and terrestrial species without backbones, closed on Sunday. Meghan Murphy/Smithsonian's National Zoo hide caption

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Meghan Murphy/Smithsonian's National Zoo

After several news outlets reported that a man dressed as a gorilla was shot with a tranquilizer gun, a zoo in Tenerife, Spain, wants to be clear: There was no gorilla suit involved. Richard Thomas/iStockphoto hide caption

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Richard Thomas/iStockphoto

The lions at the Copenhagen Zoo eat the remains of a healthy young giraffe named Marius in February. It's unclear whether the lion pictured was one of those euthanized. Kasper Palsnov/AFP/Getty Images hide caption

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Kasper Palsnov/AFP/Getty Images

A security guard closes the gate at the Pittsburgh Zoo, where a 2-year-old boy was killed Sunday. John Heller/AP hide caption

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John Heller/AP