Vintage New England Aquarium souvenir keychain

Colorful vintage plastic New England Aquarium (Boston, MA) plastic keychain. The keychain measures 2.75 inches (including key ring) by 1.6 inches. The keychain has a predominantly clear & opaque background with a colorful (rainbow-shaded from red to purple) center square. The square shows a dolphin leaping out of the ocean and it says New England Aquarium Boston. The keychain has wear with use, including chips and scuffs, but otherwise in good vintage condition!