Greg Stone recorded this Aquacast at the Aquarium on August 20, 2015. He is the executive vice president for Conservation International.

Carl Safina recorded this Aquacast at the Aquarium on August 25, 2015. He is the author of Beyond Words: What Animals Think and Feel.

John Gillis recorded this Aquacast at the Aquarium on June 25, 2015. Gillis is a professor emeritus of history at Rutgers University.

Beth Bahner recorded this Aquacast at the Aquarium on June 17, 2015. Bahner is the animal collections manager at the Philadelphia Zoo.

Perry Hampton recorded this Aquacast at the Aquarium on May 12, 2015. Hampton is the Aquarium's vice president of husbandry.

Ellen Prager recorded this Aquacast at the Aquarium on February 10, 2015. She is the author of The Shark Whisperer, the first in a series of books for young adults.

Anthony Barnosky recorded this Aquacast at the Aquarium on January 28, 2015. Barnosky is a professor of Integrative Biology, curator of Fossil Mammals in the Museum of Paleontology, and research paleoecologist in the Museum of Vertebrate Zoology University of California, Berkeley.

Original broadcast date: January 23, 2015.

Mark Botton recorded this Aquacast at the Aquarium on January 8, 2015. He discussed horseshoe crab conservation and their role in human health care.

Ty Bowman recorded this Aquacast at the Aquarium on October 21, 2014. He discussed his photography of the Grand Canyon.