Rarely sighted Spade-toothed whale washed ashore

[xpert11]

It looks very much like a giant dolphin from my layman's point of view.  But much longer.

Agreed. Interestingly, a Spade-toothed whale resembles a dolphin but is a different species. Yet, the orca is a species of dolphin, despite its gigantic size and larger size compared to that of its cousins.

In the case of Orcas, I wonder how much of their behaviour is derived from belonging to the Dolphin family. Moreover, so little is known about Spade-toothed whales, so does that prevent a similar assessment beyond superficial resemblance?