Entrance to the Harderwijk Dolfinarium (© WikiCommons/Crispulop)

Did you know that walruses whistle and that rays are basically flattened sharks? Find out more as Anne Blair Gould revisits the Dutch marine animal park at the Harderwijk Dolfinarium. It has the world’s largest ray reef and a newly opened research and rehabilitation center, where dolphins who don’t know how to swim are taught how not to drown.

Producer: Anne Blair Gould
Broadcast: May 27, 1991