Humans first made their way into the oceans relatively recently, often in a boat, and extremely late in the Orca's biological evolution. It wasn't until recent

Humans first made their way into the oceans relatively recently, often in a boat, and extremely late in the Orca's biological evolution. It wasn't until recently that humans would be numerous enough in the water to be a viable food source for an Orca. Tweak some things about our evolution and Orcas would kill humans often, sometimes for fun. Orcas are the Hannibal Lectors of the Sea.