There've been attacks in various places and several sunk boats by Killer Whales (Orca's). They are even teaching each other how to attack boats!
They have not attacked and killed people as of yet. If they were hungry, they'd probably do so. If it was vindictive, they'd probably do so.
Note in one instance a KW split it's head open. I doubt they'd do that without a reasonable cause.
quite a story of survival after boat was sunk by KW's.
Lastly, do you think humans can learn to speak "Orca" or find another species that could cross communicate with them, to sort it the issue?
Otherwise... I'd be thinking twice about a sailing adventure...
Other ideas:
* These Orcas were trained as part of military experiment. Maybe, same done to dolphines
* They have "mental illness" and confused. I don't buy it... but whatever.
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