CHICAGO, Illinois, April 6 -- Shedd Aquarium issued the following news release: * * * Love is in the air for penguins, seahorses and more at the aquarium * * * For many species in the aquatic animal world, the change of season to springtime indicates that it's time to pair up with a mate. From choosing very particular rocks to synchronizing movements, many of Shedd's residents have unique ways of coupling throughout the season and beyond. * * * PENGUINS Both species of penguins residing a more PR