An unknown number of orcas have sunk a sailing yacht after ramming it in Moroccan waters in the Strait of Gibraltar, Spain’s maritime rescue service said on Monday, a new attack in what has become a trend in the past four years.
Archived version: https://archive.ph/PSmqu
There’s a similar account from the 6th century CE Roman Empire: https://en.m.wikipedia.org/wiki/Porphyrios_(whale)
Could be a whale, or a large orca. The story goes that it was a single creature, but I think a series of Orca attacks that got attributed to a single creature fits the evidence as easily.