This is sort of like the history of Africanized Bees.
They were purposely bred in Brazil in the 1950’s and some escaped. They have been heading northbound ever since.
Every warm season, I hear about a few Killer Bee horror stories. What is these bees could learn to eat these fish?
Bees can be very patient, waiting for their prey to surface for a quick gulp of air.
And years ago a scientist said not to worry about African bees. When they reached the USA they would have inbred with European bees and become less aggressive.
It was settled science!
It didn’t work.