Today I found out “Killer Whales”, or Orcas, are actually dolphins.  In fact, they are the largest member of the dolphin family, Delphinidae. Now strictly speaking, whales are marine animals of the order of Cetacea and occasionally Cetacea is used to refer to not just whales, but also porpoises and dolphins.  However, it generally excludes these latter mariner animals, which […]