Article Photos: Ga. Aquarium expecting rare beluga whale birth 3/4

  Animal care and training specialist Mackezie Mueller works with The Georgia Aquarium's resident pregnant beluga whale Maris in the aquarium's tank in Atlanta, Wednesday, April 11, 2012. Maris, is expected to give birth by June. She the first mammal to conceive at the downtown Atlanta attraction since it opened in 2005. (AP Photo/John Bazemore)